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Finding the Fourth Proportional to 578,429.80, 869,718.30 and 487,191.40

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Solution

The fourth proportional to 578,429.80, 869,718.30 and 487,191.40 is: 732,533.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,429.80 : 869,718.30 = 487,191.40 : x
  2. Step 2: Convert to fraction form
    578,429.80/869,718.30 = 487,191.40/x
  3. Step 3: Cross multiply
    578,429.80x = 869,718.30 × 487,191.40
  4. Step 4: Simplify right side
    578,429.80x = 423,719,276,182.62
  5. Step 5: Solve for x
    x = 423,719,276,182.62/578,429.80
  6. Step 6: Final answer
    x = 732,533.62

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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.