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Finding the Fourth Proportional to 660,756.60, 911,799.18 and 358,944.12

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Solution

The fourth proportional to 660,756.60, 911,799.18 and 358,944.12 is: 495,318.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,756.60 : 911,799.18 = 358,944.12 : x
  2. Step 2: Convert to fraction form
    660,756.60/911,799.18 = 358,944.12/x
  3. Step 3: Cross multiply
    660,756.60x = 911,799.18 × 358,944.12
  4. Step 4: Simplify right side
    660,756.60x = 327,284,954,281.82
  5. Step 5: Solve for x
    x = 327,284,954,281.82/660,756.60
  6. Step 6: Final answer
    x = 495,318.48

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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.