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Finding the Fourth Proportional to 450,065.80, 674,990.70 and 260,115.40

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Solution

The fourth proportional to 450,065.80, 674,990.70 and 260,115.40 is: 390,110.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,065.80 : 674,990.70 = 260,115.40 : x
  2. Step 2: Convert to fraction form
    450,065.80/674,990.70 = 260,115.40/x
  3. Step 3: Cross multiply
    450,065.80x = 674,990.70 × 260,115.40
  4. Step 4: Simplify right side
    450,065.80x = 175,575,475,926.78
  5. Step 5: Solve for x
    x = 175,575,475,926.78/450,065.80
  6. Step 6: Final answer
    x = 390,110.68

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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.