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Finding the Fourth Proportional to 500,532.96, 690,181.98 and 318,957.28

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Solution

The fourth proportional to 500,532.96, 690,181.98 and 318,957.28 is: 439,808.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,532.96 : 690,181.98 = 318,957.28 : x
  2. Step 2: Convert to fraction form
    500,532.96/690,181.98 = 318,957.28/x
  3. Step 3: Cross multiply
    500,532.96x = 690,181.98 × 318,957.28
  4. Step 4: Simplify right side
    500,532.96x = 220,138,567,045.81
  5. Step 5: Solve for x
    x = 220,138,567,045.81/500,532.96
  6. Step 6: Final answer
    x = 439,808.33

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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.