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Finding the Fourth Proportional to 554,654.64, 765,407.88 and 312,959.71

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Solution

The fourth proportional to 554,654.64, 765,407.88 and 312,959.71 is: 431,875.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,654.64 : 765,407.88 = 312,959.71 : x
  2. Step 2: Convert to fraction form
    554,654.64/765,407.88 = 312,959.71/x
  3. Step 3: Cross multiply
    554,654.64x = 765,407.88 × 312,959.71
  4. Step 4: Simplify right side
    554,654.64x = 239,541,828,156.52
  5. Step 5: Solve for x
    x = 239,541,828,156.52/554,654.64
  6. Step 6: Final answer
    x = 431,875.64

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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.