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Finding the Fourth Proportional to 666,768.92, 920,141.20 and 360,845.40

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Solution

The fourth proportional to 666,768.92, 920,141.20 and 360,845.40 is: 497,966.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,768.92 : 920,141.20 = 360,845.40 : x
  2. Step 2: Convert to fraction form
    666,768.92/920,141.20 = 360,845.40/x
  3. Step 3: Cross multiply
    666,768.92x = 920,141.20 × 360,845.40
  4. Step 4: Simplify right side
    666,768.92x = 332,028,719,370.48
  5. Step 5: Solve for x
    x = 332,028,719,370.48/666,768.92
  6. Step 6: Final answer
    x = 497,966.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.