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Finding the Fourth Proportional to 870,854.42, 1,201,712.74 and 488,807.39

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Solution

The fourth proportional to 870,854.42, 1,201,712.74 and 488,807.39 is: 674,516.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,854.42 : 1,201,712.74 = 488,807.39 : x
  2. Step 2: Convert to fraction form
    870,854.42/1,201,712.74 = 488,807.39/x
  3. Step 3: Cross multiply
    870,854.42x = 1,201,712.74 × 488,807.39
  4. Step 4: Simplify right side
    870,854.42x = 587,406,067,969.15
  5. Step 5: Solve for x
    x = 587,406,067,969.15/870,854.42
  6. Step 6: Final answer
    x = 674,516.95

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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.