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Finding the Fourth Proportional to 621,385.10, 857,503.26 and 349,452.86

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Solution

The fourth proportional to 621,385.10, 857,503.26 and 349,452.86 is: 482,240.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,385.10 : 857,503.26 = 349,452.86 : x
  2. Step 2: Convert to fraction form
    621,385.10/857,503.26 = 349,452.86/x
  3. Step 3: Cross multiply
    621,385.10x = 857,503.26 × 349,452.86
  4. Step 4: Simplify right side
    621,385.10x = 299,656,966,666.32
  5. Step 5: Solve for x
    x = 299,656,966,666.32/621,385.10
  6. Step 6: Final answer
    x = 482,240.35

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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.