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Finding the Fourth Proportional to 485,799.40, 728,699.10 and 434,623.60

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Solution

The fourth proportional to 485,799.40, 728,699.10 and 434,623.60 is: 651,935.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,799.40 : 728,699.10 = 434,623.60 : x
  2. Step 2: Convert to fraction form
    485,799.40/728,699.10 = 434,623.60/x
  3. Step 3: Cross multiply
    485,799.40x = 728,699.10 × 434,623.60
  4. Step 4: Simplify right side
    485,799.40x = 316,709,826,158.76
  5. Step 5: Solve for x
    x = 316,709,826,158.76/485,799.40
  6. Step 6: Final answer
    x = 651,935.40

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Double scale
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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.