Home / 1,421,989.20-2,132,983.80-918,104.40

Finding the Fourth Proportional to 1,421,989.20, 2,132,983.80 and 918,104.40

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Solution

The fourth proportional to 1,421,989.20, 2,132,983.80 and 918,104.40 is: 1,377,156.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421,989.20 : 2,132,983.80 = 918,104.40 : x
  2. Step 2: Convert to fraction form
    1,421,989.20/2,132,983.80 = 918,104.40/x
  3. Step 3: Cross multiply
    1,421,989.20x = 2,132,983.80 × 918,104.40
  4. Step 4: Simplify right side
    1,421,989.20x = 1,958,301,811,908.72
  5. Step 5: Solve for x
    x = 1,958,301,811,908.72/1,421,989.20
  6. Step 6: Final answer
    x = 1,377,156.60

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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.