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Finding the Fourth Proportional to 828,978.80, 1,243,468.20 and 577,036.40

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Solution

The fourth proportional to 828,978.80, 1,243,468.20 and 577,036.40 is: 865,554.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,978.80 : 1,243,468.20 = 577,036.40 : x
  2. Step 2: Convert to fraction form
    828,978.80/1,243,468.20 = 577,036.40/x
  3. Step 3: Cross multiply
    828,978.80x = 1,243,468.20 × 577,036.40
  4. Step 4: Simplify right side
    828,978.80x = 717,526,413,642.48
  5. Step 5: Solve for x
    x = 717,526,413,642.48/828,978.80
  6. Step 6: Final answer
    x = 865,554.60

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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.