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Finding the Fourth Proportional to 615,218.80, 921,964.20 and 489,074.80

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Solution

The fourth proportional to 615,218.80, 921,964.20 and 489,074.80 is: 732,925.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,218.80 : 921,964.20 = 489,074.80 : x
  2. Step 2: Convert to fraction form
    615,218.80/921,964.20 = 489,074.80/x
  3. Step 3: Cross multiply
    615,218.80x = 921,964.20 × 489,074.80
  4. Step 4: Simplify right side
    615,218.80x = 450,909,456,722.16
  5. Step 5: Solve for x
    x = 450,909,456,722.16/615,218.80
  6. Step 6: Final answer
    x = 732,925.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.