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Finding the Fourth Proportional to 710,854.83, 980,979.60 and 388,566.23

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Solution

The fourth proportional to 710,854.83, 980,979.60 and 388,566.23 is: 536,221.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,854.83 : 980,979.60 = 388,566.23 : x
  2. Step 2: Convert to fraction form
    710,854.83/980,979.60 = 388,566.23/x
  3. Step 3: Cross multiply
    710,854.83x = 980,979.60 × 388,566.23
  4. Step 4: Simplify right side
    710,854.83x = 381,175,539,974.01
  5. Step 5: Solve for x
    x = 381,175,539,974.01/710,854.83
  6. Step 6: Final answer
    x = 536,221.35

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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.