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Finding the Fourth Proportional to 644,278.88, 889,116.90 and 357,825.80

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Solution

The fourth proportional to 644,278.88, 889,116.90 and 357,825.80 is: 493,806.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,278.88 : 889,116.90 = 357,825.80 : x
  2. Step 2: Convert to fraction form
    644,278.88/889,116.90 = 357,825.80/x
  3. Step 3: Cross multiply
    644,278.88x = 889,116.90 × 357,825.80
  4. Step 4: Simplify right side
    644,278.88x = 318,148,966,036.02
  5. Step 5: Solve for x
    x = 318,148,966,036.02/644,278.88
  6. Step 6: Final answer
    x = 493,806.29

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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.