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Finding the Fourth Proportional to 865,673.20, 1,298,509.80 and 802,687.60

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Solution

The fourth proportional to 865,673.20, 1,298,509.80 and 802,687.60 is: 1,204,031.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,673.20 : 1,298,509.80 = 802,687.60 : x
  2. Step 2: Convert to fraction form
    865,673.20/1,298,509.80 = 802,687.60/x
  3. Step 3: Cross multiply
    865,673.20x = 1,298,509.80 × 802,687.60
  4. Step 4: Simplify right side
    865,673.20x = 1,042,297,714,938.48
  5. Step 5: Solve for x
    x = 1,042,297,714,938.48/865,673.20
  6. Step 6: Final answer
    x = 1,204,031.40

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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.