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Finding the Fourth Proportional to 521,621.10, 782,431.65 and 360,657.90

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Solution

The fourth proportional to 521,621.10, 782,431.65 and 360,657.90 is: 540,986.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,621.10 : 782,431.65 = 360,657.90 : x
  2. Step 2: Convert to fraction form
    521,621.10/782,431.65 = 360,657.90/x
  3. Step 3: Cross multiply
    521,621.10x = 782,431.65 × 360,657.90
  4. Step 4: Simplify right side
    521,621.10x = 282,190,155,782.54
  5. Step 5: Solve for x
    x = 282,190,155,782.54/521,621.10
  6. Step 6: Final answer
    x = 540,986.85

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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.