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Finding the Fourth Proportional to 909,908.10, 1,364,862.15 and 611,309.70

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Solution

The fourth proportional to 909,908.10, 1,364,862.15 and 611,309.70 is: 916,964.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    909,908.10 : 1,364,862.15 = 611,309.70 : x
  2. Step 2: Convert to fraction form
    909,908.10/1,364,862.15 = 611,309.70/x
  3. Step 3: Cross multiply
    909,908.10x = 1,364,862.15 × 611,309.70
  4. Step 4: Simplify right side
    909,908.10x = 834,353,471,457.86
  5. Step 5: Solve for x
    x = 834,353,471,457.86/909,908.10
  6. Step 6: Final answer
    x = 916,964.55

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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.