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Finding the Fourth Proportional to 495,386.88, 683,658 and 280,536

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Solution

The fourth proportional to 495,386.88, 683,658 and 280,536 is: 387,153.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    495,386.88 : 683,658 = 280,536 : x
  2. Step 2: Convert to fraction form
    495,386.88/683,658 = 280,536/x
  3. Step 3: Cross multiply
    495,386.88x = 683,658 × 280,536
  4. Step 4: Simplify right side
    495,386.88x = 191,790,680,688
  5. Step 5: Solve for x
    x = 191,790,680,688/495,386.88
  6. Step 6: Final answer
    x = 387,153.33

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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.