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Finding the Fourth Proportional to 578,689.38, 798,557.20 and 316,992.62

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Solution

The fourth proportional to 578,689.38, 798,557.20 and 316,992.62 is: 437,431.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,689.38 : 798,557.20 = 316,992.62 : x
  2. Step 2: Convert to fraction form
    578,689.38/798,557.20 = 316,992.62/x
  3. Step 3: Cross multiply
    578,689.38x = 798,557.20 × 316,992.62
  4. Step 4: Simplify right side
    578,689.38x = 253,136,740,251.78
  5. Step 5: Solve for x
    x = 253,136,740,251.78/578,689.38
  6. Step 6: Final answer
    x = 437,431.11

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1.5x scale

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.