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Finding the Fourth Proportional to 660,789.25, 911,889.98 and 358,983.25

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Solution

The fourth proportional to 660,789.25, 911,889.98 and 358,983.25 is: 495,397.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,789.25 : 911,889.98 = 358,983.25 : x
  2. Step 2: Convert to fraction form
    660,789.25/911,889.98 = 358,983.25/x
  3. Step 3: Cross multiply
    660,789.25x = 911,889.98 × 358,983.25
  4. Step 4: Simplify right side
    660,789.25x = 327,353,226,867.92
  5. Step 5: Solve for x
    x = 327,353,226,867.92/660,789.25
  6. Step 6: Final answer
    x = 495,397.33

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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.