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Finding the Fourth Proportional to 971,318.80, 1,456,978.20 and 938,659.60

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Solution

The fourth proportional to 971,318.80, 1,456,978.20 and 938,659.60 is: 1,407,989.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    971,318.80 : 1,456,978.20 = 938,659.60 : x
  2. Step 2: Convert to fraction form
    971,318.80/1,456,978.20 = 938,659.60/x
  3. Step 3: Cross multiply
    971,318.80x = 1,456,978.20 × 938,659.60
  4. Step 4: Simplify right side
    971,318.80x = 1,367,606,574,420.72
  5. Step 5: Solve for x
    x = 1,367,606,574,420.72/971,318.80
  6. Step 6: Final answer
    x = 1,407,989.40

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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.