Home / 1,251.60-1,877.40-430.13

Finding the Fourth Proportional to 1,251.60, 1,877.40 and 430.13

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Solution

The fourth proportional to 1,251.60, 1,877.40 and 430.13 is: 645.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,251.60 : 1,877.40 = 430.13 : x
  2. Step 2: Convert to fraction form
    1,251.60/1,877.40 = 430.13/x
  3. Step 3: Cross multiply
    1,251.60x = 1,877.40 × 430.13
  4. Step 4: Simplify right side
    1,251.60x = 807,516.68
  5. Step 5: Solve for x
    x = 807,516.68/1,251.60
  6. Step 6: Final answer
    x = 645.19

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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.