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Finding the Fourth Proportional to 578,425.80, 869,712.30 and 487,187.40

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Solution

The fourth proportional to 578,425.80, 869,712.30 and 487,187.40 is: 732,527.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,425.80 : 869,712.30 = 487,187.40 : x
  2. Step 2: Convert to fraction form
    578,425.80/869,712.30 = 487,187.40/x
  3. Step 3: Cross multiply
    578,425.80x = 869,712.30 × 487,187.40
  4. Step 4: Simplify right side
    578,425.80x = 423,712,874,185.02
  5. Step 5: Solve for x
    x = 423,712,874,185.02/578,425.80
  6. Step 6: Final answer
    x = 732,527.62

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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.