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Finding the Fourth Proportional to 612,040.80, 918,061.20 and 433,581.60

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Solution

The fourth proportional to 612,040.80, 918,061.20 and 433,581.60 is: 650,372.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,040.80 : 918,061.20 = 433,581.60 : x
  2. Step 2: Convert to fraction form
    612,040.80/918,061.20 = 433,581.60/x
  3. Step 3: Cross multiply
    612,040.80x = 918,061.20 × 433,581.60
  4. Step 4: Simplify right side
    612,040.80x = 398,054,443,993.92
  5. Step 5: Solve for x
    x = 398,054,443,993.92/612,040.80
  6. Step 6: Final answer
    x = 650,372.40

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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.