Home / 523,030,644.91-721,833,307.29-390,641,902.39

Finding the Fourth Proportional to 523,030,644.91, 721,833,307.29 and 390,641,902.39

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Solution

The fourth proportional to 523,030,644.91, 721,833,307.29 and 390,641,902.39 is: 539,123,929.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    523,030,644.91 : 721,833,307.29 = 390,641,902.39 : x
  2. Step 2: Convert to fraction form
    523,030,644.91/721,833,307.29 = 390,641,902.39/x
  3. Step 3: Cross multiply
    523,030,644.91x = 721,833,307.29 × 390,641,902.39
  4. Step 4: Simplify right side
    523,030,644.91x = 281,978,336,368,231,040
  5. Step 5: Solve for x
    x = 281,978,336,368,231,040/523,030,644.91
  6. Step 6: Final answer
    x = 539,123,929.19

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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.