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Finding the Fourth Proportional to 620,405.20, 930,607.80 and 265,455.10

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Solution

The fourth proportional to 620,405.20, 930,607.80 and 265,455.10 is: 398,182.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,405.20 : 930,607.80 = 265,455.10 : x
  2. Step 2: Convert to fraction form
    620,405.20/930,607.80 = 265,455.10/x
  3. Step 3: Cross multiply
    620,405.20x = 930,607.80 × 265,455.10
  4. Step 4: Simplify right side
    620,405.20x = 247,034,586,609.78
  5. Step 5: Solve for x
    x = 247,034,586,609.78/620,405.20
  6. Step 6: Final answer
    x = 398,182.65

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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.