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Finding the Fourth Proportional to 611,643.35, 917,465.03 and 485,672.15

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Solution

The fourth proportional to 611,643.35, 917,465.03 and 485,672.15 is: 728,508.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,643.35 : 917,465.03 = 485,672.15 : x
  2. Step 2: Convert to fraction form
    611,643.35/917,465.03 = 485,672.15/x
  3. Step 3: Cross multiply
    611,643.35x = 917,465.03 × 485,672.15
  4. Step 4: Simplify right side
    611,643.35x = 445,587,211,241.55
  5. Step 5: Solve for x
    x = 445,587,211,241.55/611,643.35
  6. Step 6: Final answer
    x = 728,508.23

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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.