Home / 1,555.20-2,332.80-899.10

Finding the Fourth Proportional to 1,555.20, 2,332.80 and 899.10

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Solution

The fourth proportional to 1,555.20, 2,332.80 and 899.10 is: 1,348.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.20 : 2,332.80 = 899.10 : x
  2. Step 2: Convert to fraction form
    1,555.20/2,332.80 = 899.10/x
  3. Step 3: Cross multiply
    1,555.20x = 2,332.80 × 899.10
  4. Step 4: Simplify right side
    1,555.20x = 2,097,420.48
  5. Step 5: Solve for x
    x = 2,097,420.48/1,555.20
  6. Step 6: Final answer
    x = 1,348.65

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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.