Home / 669,312.20-1,002,218.70-431,366.60

Finding the Fourth Proportional to 669,312.20, 1,002,218.70 and 431,366.60

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Solution

The fourth proportional to 669,312.20, 1,002,218.70 and 431,366.60 is: 645,922.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,312.20 : 1,002,218.70 = 431,366.60 : x
  2. Step 2: Convert to fraction form
    669,312.20/1,002,218.70 = 431,366.60/x
  3. Step 3: Cross multiply
    669,312.20x = 1,002,218.70 × 431,366.60
  4. Step 4: Simplify right side
    669,312.20x = 432,323,673,075.42
  5. Step 5: Solve for x
    x = 432,323,673,075.42/669,312.20
  6. Step 6: Final answer
    x = 645,922.30

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Double scale
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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.