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Finding the Fourth Proportional to 611,818.60, 917,727.90 and 485,847.40

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Solution

The fourth proportional to 611,818.60, 917,727.90 and 485,847.40 is: 728,771.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,818.60 : 917,727.90 = 485,847.40 : x
  2. Step 2: Convert to fraction form
    611,818.60/917,727.90 = 485,847.40/x
  3. Step 3: Cross multiply
    611,818.60x = 917,727.90 × 485,847.40
  4. Step 4: Simplify right side
    611,818.60x = 445,875,714,122.46
  5. Step 5: Solve for x
    x = 445,875,714,122.46/611,818.60
  6. Step 6: Final answer
    x = 728,771.10

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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.