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Finding the Fourth Proportional to 639,377,862.90, 896,036,000.70 and 639,377,862.90

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Solution

The fourth proportional to 639,377,862.90, 896,036,000.70 and 639,377,862.90 is: 896,036,000.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,377,862.90 : 896,036,000.70 = 639,377,862.90 : x
  2. Step 2: Convert to fraction form
    639,377,862.90/896,036,000.70 = 639,377,862.90/x
  3. Step 3: Cross multiply
    639,377,862.90x = 896,036,000.70 × 639,377,862.90
  4. Step 4: Simplify right side
    639,377,862.90x = 572,905,583,209,028,928
  5. Step 5: Solve for x
    x = 572,905,583,209,028,928/639,377,862.90
  6. Step 6: Final answer
    x = 896,036,000.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.