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Finding the Fourth Proportional to 487,785.20, 672,696.29 and 418,851.20

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Solution

The fourth proportional to 487,785.20, 672,696.29 and 418,851.20 is: 577,630.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,785.20 : 672,696.29 = 418,851.20 : x
  2. Step 2: Convert to fraction form
    487,785.20/672,696.29 = 418,851.20/x
  3. Step 3: Cross multiply
    487,785.20x = 672,696.29 × 418,851.20
  4. Step 4: Simplify right side
    487,785.20x = 281,759,651,030.92
  5. Step 5: Solve for x
    x = 281,759,651,030.92/487,785.20
  6. Step 6: Final answer
    x = 577,630.59

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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.