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Finding the Fourth Proportional to 660,770.40, 911,864.24 and 358,964.64

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Solution

The fourth proportional to 660,770.40, 911,864.24 and 358,964.64 is: 495,371.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,770.40 : 911,864.24 = 358,964.64 : x
  2. Step 2: Convert to fraction form
    660,770.40/911,864.24 = 358,964.64/x
  3. Step 3: Cross multiply
    660,770.40x = 911,864.24 × 358,964.64
  4. Step 4: Simplify right side
    660,770.40x = 327,327,018,640.47
  5. Step 5: Solve for x
    x = 327,327,018,640.47/660,770.40
  6. Step 6: Final answer
    x = 495,371.79

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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.