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Finding the Fourth Proportional to 661,258.16, 911,691.58 and 428,273.54

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Solution

The fourth proportional to 661,258.16, 911,691.58 and 428,273.54 is: 590,470.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,258.16 : 911,691.58 = 428,273.54 : x
  2. Step 2: Convert to fraction form
    661,258.16/911,691.58 = 428,273.54/x
  3. Step 3: Cross multiply
    661,258.16x = 911,691.58 × 428,273.54
  4. Step 4: Simplify right side
    661,258.16x = 390,453,380,354.79
  5. Step 5: Solve for x
    x = 390,453,380,354.79/661,258.16
  6. Step 6: Final answer
    x = 590,470.42

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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.