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Finding the Fourth Proportional to 672,808,496.78, 928,475,910.57 and 371,393,991.65

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Solution

The fourth proportional to 672,808,496.78, 928,475,910.57 and 371,393,991.65 is: 512,523,810.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,808,496.78 : 928,475,910.57 = 371,393,991.65 : x
  2. Step 2: Convert to fraction form
    672,808,496.78/928,475,910.57 = 371,393,991.65/x
  3. Step 3: Cross multiply
    672,808,496.78x = 928,475,910.57 × 371,393,991.65
  4. Step 4: Simplify right side
    672,808,496.78x = 344,830,374,572,818,368
  5. Step 5: Solve for x
    x = 344,830,374,572,818,368/672,808,496.78
  6. Step 6: Final answer
    x = 512,523,810.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.