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Finding the Fourth Proportional to 391,296.80, 586,945.20 and 141,946.40

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Solution

The fourth proportional to 391,296.80, 586,945.20 and 141,946.40 is: 212,919.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,296.80 : 586,945.20 = 141,946.40 : x
  2. Step 2: Convert to fraction form
    391,296.80/586,945.20 = 141,946.40/x
  3. Step 3: Cross multiply
    391,296.80x = 586,945.20 × 141,946.40
  4. Step 4: Simplify right side
    391,296.80x = 83,314,758,137.28
  5. Step 5: Solve for x
    x = 83,314,758,137.28/391,296.80
  6. Step 6: Final answer
    x = 212,919.60

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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.