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Finding the Fourth Proportional to 656,888,727.29, 906,408,931.86 and 398,966,128.88

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Solution

The fourth proportional to 656,888,727.29, 906,408,931.86 and 398,966,128.88 is: 550,514,033.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,888,727.29 : 906,408,931.86 = 398,966,128.88 : x
  2. Step 2: Convert to fraction form
    656,888,727.29/906,408,931.86 = 398,966,128.88/x
  3. Step 3: Cross multiply
    656,888,727.29x = 906,408,931.86 × 398,966,128.88
  4. Step 4: Simplify right side
    656,888,727.29x = 361,626,462,721,907,840
  5. Step 5: Solve for x
    x = 361,626,462,721,907,840/656,888,727.29
  6. Step 6: Final answer
    x = 550,514,033.35

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