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Finding the Fourth Proportional to 391,056.48, 586,688.40 and 141,775.20

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Solution

The fourth proportional to 391,056.48, 586,688.40 and 141,775.20 is: 212,700.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,056.48 : 586,688.40 = 141,775.20 : x
  2. Step 2: Convert to fraction form
    391,056.48/586,688.40 = 141,775.20/x
  3. Step 3: Cross multiply
    391,056.48x = 586,688.40 × 141,775.20
  4. Step 4: Simplify right side
    391,056.48x = 83,177,865,247.68
  5. Step 5: Solve for x
    x = 83,177,865,247.68/391,056.48
  6. Step 6: Final answer
    x = 212,700.39

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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.