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Finding the Fourth Proportional to 890,663, 1,229,192.70 and 488,332.76

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Solution

The fourth proportional to 890,663, 1,229,192.70 and 488,332.76 is: 673,941.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,663 : 1,229,192.70 = 488,332.76 : x
  2. Step 2: Convert to fraction form
    890,663/1,229,192.70 = 488,332.76/x
  3. Step 3: Cross multiply
    890,663x = 1,229,192.70 × 488,332.76
  4. Step 4: Simplify right side
    890,663x = 600,255,063,762.85
  5. Step 5: Solve for x
    x = 600,255,063,762.85/890,663
  6. Step 6: Final answer
    x = 673,941.84

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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.