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Finding the Fourth Proportional to 660,979.32, 912,164.96 and 359,192.76

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Solution

The fourth proportional to 660,979.32, 912,164.96 and 359,192.76 is: 495,693.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,979.32 : 912,164.96 = 359,192.76 : x
  2. Step 2: Convert to fraction form
    660,979.32/912,164.96 = 359,192.76/x
  3. Step 3: Cross multiply
    660,979.32x = 912,164.96 × 359,192.76
  4. Step 4: Simplify right side
    660,979.32x = 327,643,047,761.73
  5. Step 5: Solve for x
    x = 327,643,047,761.73/660,979.32
  6. Step 6: Final answer
    x = 495,693.34

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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.