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Finding the Fourth Proportional to 40,285.80, 60,428.70 and 38,579.40

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Solution

The fourth proportional to 40,285.80, 60,428.70 and 38,579.40 is: 57,869.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,285.80 : 60,428.70 = 38,579.40 : x
  2. Step 2: Convert to fraction form
    40,285.80/60,428.70 = 38,579.40/x
  3. Step 3: Cross multiply
    40,285.80x = 60,428.70 × 38,579.40
  4. Step 4: Simplify right side
    40,285.80x = 2,331,302,988.78
  5. Step 5: Solve for x
    x = 2,331,302,988.78/40,285.80
  6. Step 6: Final answer
    x = 57,869.10

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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.