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Finding the Fourth Proportional to 710,074.22, 979,897.41 and 387,784.40

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Solution

The fourth proportional to 710,074.22, 979,897.41 and 387,784.40 is: 535,139.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,074.22 : 979,897.41 = 387,784.40 : x
  2. Step 2: Convert to fraction form
    710,074.22/979,897.41 = 387,784.40/x
  3. Step 3: Cross multiply
    710,074.22x = 979,897.41 × 387,784.40
  4. Step 4: Simplify right side
    710,074.22x = 379,988,924,298.92
  5. Step 5: Solve for x
    x = 379,988,924,298.92/710,074.22
  6. Step 6: Final answer
    x = 535,139.73

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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.