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Finding the Fourth Proportional to 289,719.20, 392,520.60 and 289,719.20

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Solution

The fourth proportional to 289,719.20, 392,520.60 and 289,719.20 is: 392,520.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,719.20 : 392,520.60 = 289,719.20 : x
  2. Step 2: Convert to fraction form
    289,719.20/392,520.60 = 289,719.20/x
  3. Step 3: Cross multiply
    289,719.20x = 392,520.60 × 289,719.20
  4. Step 4: Simplify right side
    289,719.20x = 113,720,754,215.52
  5. Step 5: Solve for x
    x = 113,720,754,215.52/289,719.20
  6. Step 6: Final answer
    x = 392,520.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.