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Finding the Fourth Proportional to 971,291.80, 1,456,937.70 and 687,856.60

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Solution

The fourth proportional to 971,291.80, 1,456,937.70 and 687,856.60 is: 1,031,784.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    971,291.80 : 1,456,937.70 = 687,856.60 : x
  2. Step 2: Convert to fraction form
    971,291.80/1,456,937.70 = 687,856.60/x
  3. Step 3: Cross multiply
    971,291.80x = 1,456,937.70 × 687,856.60
  4. Step 4: Simplify right side
    971,291.80x = 1,002,164,212,733.82
  5. Step 5: Solve for x
    x = 1,002,164,212,733.82/971,291.80
  6. Step 6: Final answer
    x = 1,031,784.90

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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.