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Finding the Fourth Proportional to 640,694.48, 884,159.88 and 368,779.28

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Solution

The fourth proportional to 640,694.48, 884,159.88 and 368,779.28 is: 508,916.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,694.48 : 884,159.88 = 368,779.28 : x
  2. Step 2: Convert to fraction form
    640,694.48/884,159.88 = 368,779.28/x
  3. Step 3: Cross multiply
    640,694.48x = 884,159.88 × 368,779.28
  4. Step 4: Simplify right side
    640,694.48x = 326,059,843,951.29
  5. Step 5: Solve for x
    x = 326,059,843,951.29/640,694.48
  6. Step 6: Final answer
    x = 508,916.27

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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.