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Finding the Fourth Proportional to 904,104.80, 1,357,712.40 and 639,720.80

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Solution

The fourth proportional to 904,104.80, 1,357,712.40 and 639,720.80 is: 960,681.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    904,104.80 : 1,357,712.40 = 639,720.80 : x
  2. Step 2: Convert to fraction form
    904,104.80/1,357,712.40 = 639,720.80/x
  3. Step 3: Cross multiply
    904,104.80x = 1,357,712.40 × 639,720.80
  4. Step 4: Simplify right side
    904,104.80x = 868,556,862,697.92
  5. Step 5: Solve for x
    x = 868,556,862,697.92/904,104.80
  6. Step 6: Final answer
    x = 960,681.62

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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.