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Finding the Fourth Proportional to 625,590,959.80, 938,386,439.70 and 165,575,630.20

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Solution

The fourth proportional to 625,590,959.80, 938,386,439.70 and 165,575,630.20 is: 248,363,445.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,590,959.80 : 938,386,439.70 = 165,575,630.20 : x
  2. Step 2: Convert to fraction form
    625,590,959.80/938,386,439.70 = 165,575,630.20/x
  3. Step 3: Cross multiply
    625,590,959.80x = 938,386,439.70 × 165,575,630.20
  4. Step 4: Simplify right side
    625,590,959.80x = 155,373,926,124,461,792
  5. Step 5: Solve for x
    x = 155,373,926,124,461,792/625,590,959.80
  6. Step 6: Final answer
    x = 248,363,445.30

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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.