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Finding the Fourth Proportional to 639,604,908.90, 960,124,808.70 and 494,680,948.20

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Solution

The fourth proportional to 639,604,908.90, 960,124,808.70 and 494,680,948.20 is: 742,576,306.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,604,908.90 : 960,124,808.70 = 494,680,948.20 : x
  2. Step 2: Convert to fraction form
    639,604,908.90/960,124,808.70 = 494,680,948.20/x
  3. Step 3: Cross multiply
    639,604,908.90x = 960,124,808.70 × 494,680,948.20
  4. Step 4: Simplify right side
    639,604,908.90x = 474,955,450,758,059,648
  5. Step 5: Solve for x
    x = 474,955,450,758,059,648/639,604,908.90
  6. Step 6: Final answer
    x = 742,576,306.32

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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.