Home / 687,079.40-1,029,063.90-407,143.40

Finding the Fourth Proportional to 687,079.40, 1,029,063.90 and 407,143.40

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Solution

The fourth proportional to 687,079.40, 1,029,063.90 and 407,143.40 is: 609,793.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,079.40 : 1,029,063.90 = 407,143.40 : x
  2. Step 2: Convert to fraction form
    687,079.40/1,029,063.90 = 407,143.40/x
  3. Step 3: Cross multiply
    687,079.40x = 1,029,063.90 × 407,143.40
  4. Step 4: Simplify right side
    687,079.40x = 418,976,575,063.26
  5. Step 5: Solve for x
    x = 418,976,575,063.26/687,079.40
  6. Step 6: Final answer
    x = 609,793.53

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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.