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Finding the Fourth Proportional to 668,903.20, 1,003,354.80 and 403,482.40

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Solution

The fourth proportional to 668,903.20, 1,003,354.80 and 403,482.40 is: 605,223.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,903.20 : 1,003,354.80 = 403,482.40 : x
  2. Step 2: Convert to fraction form
    668,903.20/1,003,354.80 = 403,482.40/x
  3. Step 3: Cross multiply
    668,903.20x = 1,003,354.80 × 403,482.40
  4. Step 4: Simplify right side
    668,903.20x = 404,836,002,755.52
  5. Step 5: Solve for x
    x = 404,836,002,755.52/668,903.20
  6. Step 6: Final answer
    x = 605,223.60

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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.