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Finding the Fourth Proportional to 971,319.20, 1,456,978.80 and 551,415.20

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Solution

The fourth proportional to 971,319.20, 1,456,978.80 and 551,415.20 is: 827,122.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    971,319.20 : 1,456,978.80 = 551,415.20 : x
  2. Step 2: Convert to fraction form
    971,319.20/1,456,978.80 = 551,415.20/x
  3. Step 3: Cross multiply
    971,319.20x = 1,456,978.80 × 551,415.20
  4. Step 4: Simplify right side
    971,319.20x = 803,400,256,397.76
  5. Step 5: Solve for x
    x = 803,400,256,397.76/971,319.20
  6. Step 6: Final answer
    x = 827,122.80

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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.