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Finding the Fourth Proportional to 615,235.80, 921,989.70 and 489,091.80

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Solution

The fourth proportional to 615,235.80, 921,989.70 and 489,091.80 is: 732,950.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,235.80 : 921,989.70 = 489,091.80 : x
  2. Step 2: Convert to fraction form
    615,235.80/921,989.70 = 489,091.80/x
  3. Step 3: Cross multiply
    615,235.80x = 921,989.70 × 489,091.80
  4. Step 4: Simplify right side
    615,235.80x = 450,937,601,954.46
  5. Step 5: Solve for x
    x = 450,937,601,954.46/615,235.80
  6. Step 6: Final answer
    x = 732,950.85

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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.