Home / 626,549.20-939,823.80-311,621.20

Finding the Fourth Proportional to 626,549.20, 939,823.80 and 311,621.20

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Solution

The fourth proportional to 626,549.20, 939,823.80 and 311,621.20 is: 467,431.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,549.20 : 939,823.80 = 311,621.20 : x
  2. Step 2: Convert to fraction form
    626,549.20/939,823.80 = 311,621.20/x
  3. Step 3: Cross multiply
    626,549.20x = 939,823.80 × 311,621.20
  4. Step 4: Simplify right side
    626,549.20x = 292,869,020,344.56
  5. Step 5: Solve for x
    x = 292,869,020,344.56/626,549.20
  6. Step 6: Final answer
    x = 467,431.80

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Half scale
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Double scale
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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.