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Finding the Fourth Proportional to 257,068.80, 385,545.60 and 168,940.80

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Solution

The fourth proportional to 257,068.80, 385,545.60 and 168,940.80 is: 253,373.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,068.80 : 385,545.60 = 168,940.80 : x
  2. Step 2: Convert to fraction form
    257,068.80/385,545.60 = 168,940.80/x
  3. Step 3: Cross multiply
    257,068.80x = 385,545.60 × 168,940.80
  4. Step 4: Simplify right side
    257,068.80x = 65,134,382,100.48
  5. Step 5: Solve for x
    x = 65,134,382,100.48/257,068.80
  6. Step 6: Final answer
    x = 253,373.35

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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.