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Finding the Fourth Proportional to 865,743.40, 1,298,615.10 and 865,743.40

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Solution

The fourth proportional to 865,743.40, 1,298,615.10 and 865,743.40 is: 1,298,615.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,743.40 : 1,298,615.10 = 865,743.40 : x
  2. Step 2: Convert to fraction form
    865,743.40/1,298,615.10 = 865,743.40/x
  3. Step 3: Cross multiply
    865,743.40x = 1,298,615.10 × 865,743.40
  4. Step 4: Simplify right side
    865,743.40x = 1,124,267,451,965.34
  5. Step 5: Solve for x
    x = 1,124,267,451,965.34/865,743.40
  6. Step 6: Final answer
    x = 1,298,615.10

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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.