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Finding the Fourth Proportional to 988,900.80, 1,482,314.40 and 389,630.40

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Solution

The fourth proportional to 988,900.80, 1,482,314.40 and 389,630.40 is: 584,037.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    988,900.80 : 1,482,314.40 = 389,630.40 : x
  2. Step 2: Convert to fraction form
    988,900.80/1,482,314.40 = 389,630.40/x
  3. Step 3: Cross multiply
    988,900.80x = 1,482,314.40 × 389,630.40
  4. Step 4: Simplify right side
    988,900.80x = 577,554,752,597.76
  5. Step 5: Solve for x
    x = 577,554,752,597.76/988,900.80
  6. Step 6: Final answer
    x = 584,037.10

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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.