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Finding the Fourth Proportional to 670,604.80, 1,005,907.20 and 315,500.80

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Solution

The fourth proportional to 670,604.80, 1,005,907.20 and 315,500.80 is: 473,251.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,604.80 : 1,005,907.20 = 315,500.80 : x
  2. Step 2: Convert to fraction form
    670,604.80/1,005,907.20 = 315,500.80/x
  3. Step 3: Cross multiply
    670,604.80x = 1,005,907.20 × 315,500.80
  4. Step 4: Simplify right side
    670,604.80x = 317,364,526,325.76
  5. Step 5: Solve for x
    x = 317,364,526,325.76/670,604.80
  6. Step 6: Final answer
    x = 473,251.20

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Similar ratio
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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.