Home / 509,410.08-702,989.28-318,535.20

Finding the Fourth Proportional to 509,410.08, 702,989.28 and 318,535.20

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Solution

The fourth proportional to 509,410.08, 702,989.28 and 318,535.20 is: 439,580.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,410.08 : 702,989.28 = 318,535.20 : x
  2. Step 2: Convert to fraction form
    509,410.08/702,989.28 = 318,535.20/x
  3. Step 3: Cross multiply
    509,410.08x = 702,989.28 × 318,535.20
  4. Step 4: Simplify right side
    509,410.08x = 223,926,830,902.66
  5. Step 5: Solve for x
    x = 223,926,830,902.66/509,410.08
  6. Step 6: Final answer
    x = 439,580.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.