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Finding the Fourth Proportional to 571,235.20, 856,852.80 and 479,996.80

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Solution

The fourth proportional to 571,235.20, 856,852.80 and 479,996.80 is: 719,995.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,235.20 : 856,852.80 = 479,996.80 : x
  2. Step 2: Convert to fraction form
    571,235.20/856,852.80 = 479,996.80/x
  3. Step 3: Cross multiply
    571,235.20x = 856,852.80 × 479,996.80
  4. Step 4: Simplify right side
    571,235.20x = 411,286,602,071.04
  5. Step 5: Solve for x
    x = 411,286,602,071.04/571,235.20
  6. Step 6: Final answer
    x = 719,995.20

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.