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Finding the Fourth Proportional to 645,999.62, 891,470.76 and 359,519.62

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Solution

The fourth proportional to 645,999.62, 891,470.76 and 359,519.62 is: 496,132.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,999.62 : 891,470.76 = 359,519.62 : x
  2. Step 2: Convert to fraction form
    645,999.62/891,470.76 = 359,519.62/x
  3. Step 3: Cross multiply
    645,999.62x = 891,470.76 × 359,519.62
  4. Step 4: Simplify right side
    645,999.62x = 320,501,228,876.31
  5. Step 5: Solve for x
    x = 320,501,228,876.31/645,999.62
  6. Step 6: Final answer
    x = 496,132.23

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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.