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Finding the Fourth Proportional to 661,424,970.43, 912,759,215.65 and 364,060,854.91

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Solution

The fourth proportional to 661,424,970.43, 912,759,215.65 and 364,060,854.91 is: 502,399,992.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,424,970.43 : 912,759,215.65 = 364,060,854.91 : x
  2. Step 2: Convert to fraction form
    661,424,970.43/912,759,215.65 = 364,060,854.91/x
  3. Step 3: Cross multiply
    661,424,970.43x = 912,759,215.65 × 364,060,854.91
  4. Step 4: Simplify right side
    661,424,970.43x = 332,299,900,376,520,064
  5. Step 5: Solve for x
    x = 332,299,900,376,520,064/661,424,970.43
  6. Step 6: Final answer
    x = 502,399,992.79

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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.