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Finding the Fourth Proportional to 288,712.20, 433,068.30 and 78,376.20

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Solution

The fourth proportional to 288,712.20, 433,068.30 and 78,376.20 is: 117,564.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,712.20 : 433,068.30 = 78,376.20 : x
  2. Step 2: Convert to fraction form
    288,712.20/433,068.30 = 78,376.20/x
  3. Step 3: Cross multiply
    288,712.20x = 433,068.30 × 78,376.20
  4. Step 4: Simplify right side
    288,712.20x = 33,942,247,694.46
  5. Step 5: Solve for x
    x = 33,942,247,694.46/288,712.20
  6. Step 6: Final answer
    x = 117,564.30

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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.