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Finding the Fourth Proportional to 288,008.80, 432,013.20 and 260,015.20

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Solution

The fourth proportional to 288,008.80, 432,013.20 and 260,015.20 is: 390,022.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,008.80 : 432,013.20 = 260,015.20 : x
  2. Step 2: Convert to fraction form
    288,008.80/432,013.20 = 260,015.20/x
  3. Step 3: Cross multiply
    288,008.80x = 432,013.20 × 260,015.20
  4. Step 4: Simplify right side
    288,008.80x = 112,329,998,600.64
  5. Step 5: Solve for x
    x = 112,329,998,600.64/288,008.80
  6. Step 6: Final answer
    x = 390,022.80

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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.