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Finding the Fourth Proportional to 561,865,885.69, 775,376,581.15 and 310,987,702.44

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Solution

The fourth proportional to 561,865,885.69, 775,376,581.15 and 310,987,702.44 is: 429,163,947.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,865,885.69 : 775,376,581.15 = 310,987,702.44 : x
  2. Step 2: Convert to fraction form
    561,865,885.69/775,376,581.15 = 310,987,702.44/x
  3. Step 3: Cross multiply
    561,865,885.69x = 775,376,581.15 × 310,987,702.44
  4. Step 4: Simplify right side
    561,865,885.69x = 241,132,581,496,843,264
  5. Step 5: Solve for x
    x = 241,132,581,496,843,264/561,865,885.69
  6. Step 6: Final answer
    x = 429,163,947.55

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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.