Home / 687,790.40-1,031,685.60-404,355.20

Finding the Fourth Proportional to 687,790.40, 1,031,685.60 and 404,355.20

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Solution

The fourth proportional to 687,790.40, 1,031,685.60 and 404,355.20 is: 606,532.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,790.40 : 1,031,685.60 = 404,355.20 : x
  2. Step 2: Convert to fraction form
    687,790.40/1,031,685.60 = 404,355.20/x
  3. Step 3: Cross multiply
    687,790.40x = 1,031,685.60 × 404,355.20
  4. Step 4: Simplify right side
    687,790.40x = 417,167,437,125.12
  5. Step 5: Solve for x
    x = 417,167,437,125.12/687,790.40
  6. Step 6: Final answer
    x = 606,532.80

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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.