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Finding the Fourth Proportional to 288,990.88, 433,442.58 and 78,645.22

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Solution

The fourth proportional to 288,990.88, 433,442.58 and 78,645.22 is: 117,955.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,990.88 : 433,442.58 = 78,645.22 : x
  2. Step 2: Convert to fraction form
    288,990.88/433,442.58 = 78,645.22/x
  3. Step 3: Cross multiply
    288,990.88x = 433,442.58 × 78,645.22
  4. Step 4: Simplify right side
    288,990.88x = 34,088,187,061.47
  5. Step 5: Solve for x
    x = 34,088,187,061.47/288,990.88
  6. Step 6: Final answer
    x = 117,955.93

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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.