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Finding the Fourth Proportional to 625,593,468.80, 938,390,203.20 and 165,578,139.20

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Solution

The fourth proportional to 625,593,468.80, 938,390,203.20 and 165,578,139.20 is: 248,367,208.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,593,468.80 : 938,390,203.20 = 165,578,139.20 : x
  2. Step 2: Convert to fraction form
    625,593,468.80/938,390,203.20 = 165,578,139.20/x
  3. Step 3: Cross multiply
    625,593,468.80x = 938,390,203.20 × 165,578,139.20
  4. Step 4: Simplify right side
    625,593,468.80x = 155,376,903,689,365,888
  5. Step 5: Solve for x
    x = 155,376,903,689,365,888/625,593,468.80
  6. Step 6: Final answer
    x = 248,367,208.80

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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.