Home / 659,621.70-989,432.55-492,316.20

Finding the Fourth Proportional to 659,621.70, 989,432.55 and 492,316.20

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Solution

The fourth proportional to 659,621.70, 989,432.55 and 492,316.20 is: 738,474.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,621.70 : 989,432.55 = 492,316.20 : x
  2. Step 2: Convert to fraction form
    659,621.70/989,432.55 = 492,316.20/x
  3. Step 3: Cross multiply
    659,621.70x = 989,432.55 × 492,316.20
  4. Step 4: Simplify right side
    659,621.70x = 487,113,673,172.31
  5. Step 5: Solve for x
    x = 487,113,673,172.31/659,621.70
  6. Step 6: Final answer
    x = 738,474.30

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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.