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Finding the Fourth Proportional to 571,319.80, 856,979.70 and 361,886.20

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Solution

The fourth proportional to 571,319.80, 856,979.70 and 361,886.20 is: 542,829.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,319.80 : 856,979.70 = 361,886.20 : x
  2. Step 2: Convert to fraction form
    571,319.80/856,979.70 = 361,886.20/x
  3. Step 3: Cross multiply
    571,319.80x = 856,979.70 × 361,886.20
  4. Step 4: Simplify right side
    571,319.80x = 310,129,127,110.14
  5. Step 5: Solve for x
    x = 310,129,127,110.14/571,319.80
  6. Step 6: Final answer
    x = 542,829.30

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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.