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Finding the Fourth Proportional to 485,460.40, 728,190.60 and 402,516.40

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Solution

The fourth proportional to 485,460.40, 728,190.60 and 402,516.40 is: 603,774.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,460.40 : 728,190.60 = 402,516.40 : x
  2. Step 2: Convert to fraction form
    485,460.40/728,190.60 = 402,516.40/x
  3. Step 3: Cross multiply
    485,460.40x = 728,190.60 × 402,516.40
  4. Step 4: Simplify right side
    485,460.40x = 293,108,658,825.84
  5. Step 5: Solve for x
    x = 293,108,658,825.84/485,460.40
  6. Step 6: Final answer
    x = 603,774.60

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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.