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Finding the Fourth Proportional to 288,002.70, 432,004.05 and 278,325.90

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Solution

The fourth proportional to 288,002.70, 432,004.05 and 278,325.90 is: 417,488.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,002.70 : 432,004.05 = 278,325.90 : x
  2. Step 2: Convert to fraction form
    288,002.70/432,004.05 = 278,325.90/x
  3. Step 3: Cross multiply
    288,002.70x = 432,004.05 × 278,325.90
  4. Step 4: Simplify right side
    288,002.70x = 120,237,916,019.90
  5. Step 5: Solve for x
    x = 120,237,916,019.90/288,002.70
  6. Step 6: Final answer
    x = 417,488.85

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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.