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Finding the Fourth Proportional to 257,956.60, 386,934.90 and 70,967.80

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Solution

The fourth proportional to 257,956.60, 386,934.90 and 70,967.80 is: 106,451.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,956.60 : 386,934.90 = 70,967.80 : x
  2. Step 2: Convert to fraction form
    257,956.60/386,934.90 = 70,967.80/x
  3. Step 3: Cross multiply
    257,956.60x = 386,934.90 × 70,967.80
  4. Step 4: Simplify right side
    257,956.60x = 27,459,918,596.22
  5. Step 5: Solve for x
    x = 27,459,918,596.22/257,956.60
  6. Step 6: Final answer
    x = 106,451.70

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1.5x scale

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.