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Finding the Fourth Proportional to 429,359.90, 647,126.05 and 370,103.59

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Solution

The fourth proportional to 429,359.90, 647,126.05 and 370,103.59 is: 557,815.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,359.90 : 647,126.05 = 370,103.59 : x
  2. Step 2: Convert to fraction form
    429,359.90/647,126.05 = 370,103.59/x
  3. Step 3: Cross multiply
    429,359.90x = 647,126.05 × 370,103.59
  4. Step 4: Simplify right side
    429,359.90x = 239,503,674,287.52
  5. Step 5: Solve for x
    x = 239,503,674,287.52/429,359.90
  6. Step 6: Final answer
    x = 557,815.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.