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Finding the Fourth Proportional to 710,070.88, 979,905.60 and 387,790.48

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Solution

The fourth proportional to 710,070.88, 979,905.60 and 387,790.48 is: 535,155.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,070.88 : 979,905.60 = 387,790.48 : x
  2. Step 2: Convert to fraction form
    710,070.88/979,905.60 = 387,790.48/x
  3. Step 3: Cross multiply
    710,070.88x = 979,905.60 × 387,790.48
  4. Step 4: Simplify right side
    710,070.88x = 379,998,062,978.69
  5. Step 5: Solve for x
    x = 379,998,062,978.69/710,070.88
  6. Step 6: Final answer
    x = 535,155.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.