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Finding the Fourth Proportional to 257,287.38, 355,056.58 and 156,685.38

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Solution

The fourth proportional to 257,287.38, 355,056.58 and 156,685.38 is: 216,225.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,287.38 : 355,056.58 = 156,685.38 : x
  2. Step 2: Convert to fraction form
    257,287.38/355,056.58 = 156,685.38/x
  3. Step 3: Cross multiply
    257,287.38x = 355,056.58 × 156,685.38
  4. Step 4: Simplify right side
    257,287.38x = 55,632,175,158.80
  5. Step 5: Solve for x
    x = 55,632,175,158.80/257,287.38
  6. Step 6: Final answer
    x = 216,225.82

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1.5x scale

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.