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Finding the Fourth Proportional to 578,634.80, 870,025.80 and 487,396.40

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Solution

The fourth proportional to 578,634.80, 870,025.80 and 487,396.40 is: 732,841.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,634.80 : 870,025.80 = 487,396.40 : x
  2. Step 2: Convert to fraction form
    578,634.80/870,025.80 = 487,396.40/x
  3. Step 3: Cross multiply
    578,634.80x = 870,025.80 × 487,396.40
  4. Step 4: Simplify right side
    578,634.80x = 424,047,442,827.12
  5. Step 5: Solve for x
    x = 424,047,442,827.12/578,634.80
  6. Step 6: Final answer
    x = 732,841.24

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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.