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Finding the Fourth Proportional to 288,660.40, 432,913.80 and 88,980.40

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Solution

The fourth proportional to 288,660.40, 432,913.80 and 88,980.40 is: 133,446.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,660.40 : 432,913.80 = 88,980.40 : x
  2. Step 2: Convert to fraction form
    288,660.40/432,913.80 = 88,980.40/x
  3. Step 3: Cross multiply
    288,660.40x = 432,913.80 × 88,980.40
  4. Step 4: Simplify right side
    288,660.40x = 38,520,843,089.52
  5. Step 5: Solve for x
    x = 38,520,843,089.52/288,660.40
  6. Step 6: Final answer
    x = 133,446.93

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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.