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Finding the Fourth Proportional to 485,764.40, 728,646.60 and 434,588.60

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Solution

The fourth proportional to 485,764.40, 728,646.60 and 434,588.60 is: 651,882.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,764.40 : 728,646.60 = 434,588.60 : x
  2. Step 2: Convert to fraction form
    485,764.40/728,646.60 = 434,588.60/x
  3. Step 3: Cross multiply
    485,764.40x = 728,646.60 × 434,588.60
  4. Step 4: Simplify right side
    485,764.40x = 316,661,505,788.76
  5. Step 5: Solve for x
    x = 316,661,505,788.76/485,764.40
  6. Step 6: Final answer
    x = 651,882.90

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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.