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Finding the Fourth Proportional to 288,640.80, 432,961.20 and 88,943.40

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Solution

The fourth proportional to 288,640.80, 432,961.20 and 88,943.40 is: 133,415.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,640.80 : 432,961.20 = 88,943.40 : x
  2. Step 2: Convert to fraction form
    288,640.80/432,961.20 = 88,943.40/x
  3. Step 3: Cross multiply
    288,640.80x = 432,961.20 × 88,943.40
  4. Step 4: Simplify right side
    288,640.80x = 38,509,041,196.08
  5. Step 5: Solve for x
    x = 38,509,041,196.08/288,640.80
  6. Step 6: Final answer
    x = 133,415.10

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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.