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Finding the Fourth Proportional to 889,572, 1,227,613.68 and 487,164

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Solution

The fourth proportional to 889,572, 1,227,613.68 and 487,164 is: 672,288.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    889,572 : 1,227,613.68 = 487,164 : x
  2. Step 2: Convert to fraction form
    889,572/1,227,613.68 = 487,164/x
  3. Step 3: Cross multiply
    889,572x = 1,227,613.68 × 487,164
  4. Step 4: Simplify right side
    889,572x = 598,049,190,803.52
  5. Step 5: Solve for x
    x = 598,049,190,803.52/889,572
  6. Step 6: Final answer
    x = 672,288.69

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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.