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Finding the Fourth Proportional to 889,643.84, 1,227,662.88 and 487,227.20

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Solution

The fourth proportional to 889,643.84, 1,227,662.88 and 487,227.20 is: 672,348.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    889,643.84 : 1,227,662.88 = 487,227.20 : x
  2. Step 2: Convert to fraction form
    889,643.84/1,227,662.88 = 487,227.20/x
  3. Step 3: Cross multiply
    889,643.84x = 1,227,662.88 × 487,227.20
  4. Step 4: Simplify right side
    889,643.84x = 598,150,747,566.34
  5. Step 5: Solve for x
    x = 598,150,747,566.34/889,643.84
  6. Step 6: Final answer
    x = 672,348.55

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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.