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Finding the Fourth Proportional to 402,940.80, 604,411.20 and 166,204.80

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Solution

The fourth proportional to 402,940.80, 604,411.20 and 166,204.80 is: 249,307.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,940.80 : 604,411.20 = 166,204.80 : x
  2. Step 2: Convert to fraction form
    402,940.80/604,411.20 = 166,204.80/x
  3. Step 3: Cross multiply
    402,940.80x = 604,411.20 × 166,204.80
  4. Step 4: Simplify right side
    402,940.80x = 100,456,042,613.76
  5. Step 5: Solve for x
    x = 100,456,042,613.76/402,940.80
  6. Step 6: Final answer
    x = 249,307.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.