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Finding the Fourth Proportional to 486,003.60, 729,005.40 and 307,981.80

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Solution

The fourth proportional to 486,003.60, 729,005.40 and 307,981.80 is: 461,972.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,003.60 : 729,005.40 = 307,981.80 : x
  2. Step 2: Convert to fraction form
    486,003.60/729,005.40 = 307,981.80/x
  3. Step 3: Cross multiply
    486,003.60x = 729,005.40 × 307,981.80
  4. Step 4: Simplify right side
    486,003.60x = 224,520,395,301.72
  5. Step 5: Solve for x
    x = 224,520,395,301.72/486,003.60
  6. Step 6: Final answer
    x = 461,972.70

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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.