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Finding the Fourth Proportional to 426,955.08, 640,409.52 and 216,587.56

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Solution

The fourth proportional to 426,955.08, 640,409.52 and 216,587.56 is: 324,869.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,955.08 : 640,409.52 = 216,587.56 : x
  2. Step 2: Convert to fraction form
    426,955.08/640,409.52 = 216,587.56/x
  3. Step 3: Cross multiply
    426,955.08x = 640,409.52 × 216,587.56
  4. Step 4: Simplify right side
    426,955.08x = 138,704,735,337.57
  5. Step 5: Solve for x
    x = 138,704,735,337.57/426,955.08
  6. Step 6: Final answer
    x = 324,869.62

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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.