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Finding the Fourth Proportional to 608,465.28, 912,847.20 and 209,111.68

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Solution

The fourth proportional to 608,465.28, 912,847.20 and 209,111.68 is: 313,718.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,465.28 : 912,847.20 = 209,111.68 : x
  2. Step 2: Convert to fraction form
    608,465.28/912,847.20 = 209,111.68/x
  3. Step 3: Cross multiply
    608,465.28x = 912,847.20 × 209,111.68
  4. Step 4: Simplify right side
    608,465.28x = 190,887,011,575.30
  5. Step 5: Solve for x
    x = 190,887,011,575.30/608,465.28
  6. Step 6: Final answer
    x = 313,718.82

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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.