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Finding the Fourth Proportional to 495,398.79, 683,772.71 and 280,665.36

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Solution

The fourth proportional to 495,398.79, 683,772.71 and 280,665.36 is: 387,387.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    495,398.79 : 683,772.71 = 280,665.36 : x
  2. Step 2: Convert to fraction form
    495,398.79/683,772.71 = 280,665.36/x
  3. Step 3: Cross multiply
    495,398.79x = 683,772.71 × 280,665.36
  4. Step 4: Simplify right side
    495,398.79x = 191,911,312,407.00
  5. Step 5: Solve for x
    x = 191,911,312,407.00/495,398.79
  6. Step 6: Final answer
    x = 387,387.53

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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.