Home / 289,326.20-433,989.30-78,985.40

Finding the Fourth Proportional to 289,326.20, 433,989.30 and 78,985.40

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Solution

The fourth proportional to 289,326.20, 433,989.30 and 78,985.40 is: 118,478.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,326.20 : 433,989.30 = 78,985.40 : x
  2. Step 2: Convert to fraction form
    289,326.20/433,989.30 = 78,985.40/x
  3. Step 3: Cross multiply
    289,326.20x = 433,989.30 × 78,985.40
  4. Step 4: Simplify right side
    289,326.20x = 34,278,818,456.22
  5. Step 5: Solve for x
    x = 34,278,818,456.22/289,326.20
  6. Step 6: Final answer
    x = 118,478.10

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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.