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Finding the Fourth Proportional to 656,854,963.61, 906,462,251.19 and 355,440,276.63

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Solution

The fourth proportional to 656,854,963.61, 906,462,251.19 and 355,440,276.63 is: 490,508,881.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,854,963.61 : 906,462,251.19 = 355,440,276.63 : x
  2. Step 2: Convert to fraction form
    656,854,963.61/906,462,251.19 = 355,440,276.63/x
  3. Step 3: Cross multiply
    656,854,963.61x = 906,462,251.19 × 355,440,276.63
  4. Step 4: Simplify right side
    656,854,963.61x = 322,193,193,317,626,176
  5. Step 5: Solve for x
    x = 322,193,193,317,626,176/656,854,963.61
  6. Step 6: Final answer
    x = 490,508,881.21

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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.