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Finding the Fourth Proportional to 431,569,124.30, 647,353,686.45 and 431,569,124.30

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Solution

The fourth proportional to 431,569,124.30, 647,353,686.45 and 431,569,124.30 is: 647,353,686.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,569,124.30 : 647,353,686.45 = 431,569,124.30 : x
  2. Step 2: Convert to fraction form
    431,569,124.30/647,353,686.45 = 431,569,124.30/x
  3. Step 3: Cross multiply
    431,569,124.30x = 647,353,686.45 × 431,569,124.30
  4. Step 4: Simplify right side
    431,569,124.30x = 279,377,863,573,603,296
  5. Step 5: Solve for x
    x = 279,377,863,573,603,296/431,569,124.30
  6. Step 6: Final answer
    x = 647,353,686.45

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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.