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Finding the Fourth Proportional to 570,645.25, 787,480.72 and 315,990.97

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Solution

The fourth proportional to 570,645.25, 787,480.72 and 315,990.97 is: 436,062.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,645.25 : 787,480.72 = 315,990.97 : x
  2. Step 2: Convert to fraction form
    570,645.25/787,480.72 = 315,990.97/x
  3. Step 3: Cross multiply
    570,645.25x = 787,480.72 × 315,990.97
  4. Step 4: Simplify right side
    570,645.25x = 248,836,793,810.42
  5. Step 5: Solve for x
    x = 248,836,793,810.42/570,645.25
  6. Step 6: Final answer
    x = 436,062.15

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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.