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Finding the Fourth Proportional to 660,778.40, 911,875.28 and 358,972.64

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Solution

The fourth proportional to 660,778.40, 911,875.28 and 358,972.64 is: 495,382.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,778.40 : 911,875.28 = 358,972.64 : x
  2. Step 2: Convert to fraction form
    660,778.40/911,875.28 = 358,972.64/x
  3. Step 3: Cross multiply
    660,778.40x = 911,875.28 × 358,972.64
  4. Step 4: Simplify right side
    660,778.40x = 327,338,276,612.34
  5. Step 5: Solve for x
    x = 327,338,276,612.34/660,778.40
  6. Step 6: Final answer
    x = 495,382.83

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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.