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Finding the Fourth Proportional to 890,894.90, 1,229,613.57 and 528,519.90

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Solution

The fourth proportional to 890,894.90, 1,229,613.57 and 528,519.90 is: 729,463.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,894.90 : 1,229,613.57 = 528,519.90 : x
  2. Step 2: Convert to fraction form
    890,894.90/1,229,613.57 = 528,519.90/x
  3. Step 3: Cross multiply
    890,894.90x = 1,229,613.57 × 528,519.90
  4. Step 4: Simplify right side
    890,894.90x = 649,875,241,055.04
  5. Step 5: Solve for x
    x = 649,875,241,055.04/890,894.90
  6. Step 6: Final answer
    x = 729,463.42

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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.