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Finding the Fourth Proportional to 640,042.56, 883,366.56 and 371,926.08

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Solution

The fourth proportional to 640,042.56, 883,366.56 and 371,926.08 is: 513,320.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,042.56 : 883,366.56 = 371,926.08 : x
  2. Step 2: Convert to fraction form
    640,042.56/883,366.56 = 371,926.08/x
  3. Step 3: Cross multiply
    640,042.56x = 883,366.56 × 371,926.08
  4. Step 4: Simplify right side
    640,042.56x = 328,547,061,863.89
  5. Step 5: Solve for x
    x = 328,547,061,863.89/640,042.56
  6. Step 6: Final answer
    x = 513,320.65

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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.