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Finding the Fourth Proportional to 646,521.26, 891,958.10 and 645,524.42

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Solution

The fourth proportional to 646,521.26, 891,958.10 and 645,524.42 is: 890,582.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,521.26 : 891,958.10 = 645,524.42 : x
  2. Step 2: Convert to fraction form
    646,521.26/891,958.10 = 645,524.42/x
  3. Step 3: Cross multiply
    646,521.26x = 891,958.10 × 645,524.42
  4. Step 4: Simplify right side
    646,521.26x = 575,780,735,166.80
  5. Step 5: Solve for x
    x = 575,780,735,166.80/646,521.26
  6. Step 6: Final answer
    x = 890,582.83

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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.