Home / 1,279,131-1,918,521.50-380,711.40

Finding the Fourth Proportional to 1,279,131, 1,918,521.50 and 380,711.40

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Solution

The fourth proportional to 1,279,131, 1,918,521.50 and 380,711.40 is: 571,015.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,131 : 1,918,521.50 = 380,711.40 : x
  2. Step 2: Convert to fraction form
    1,279,131/1,918,521.50 = 380,711.40/x
  3. Step 3: Cross multiply
    1,279,131x = 1,918,521.50 × 380,711.40
  4. Step 4: Simplify right side
    1,279,131x = 730,403,006,195.10
  5. Step 5: Solve for x
    x = 730,403,006,195.10/1,279,131
  6. Step 6: Final answer
    x = 571,015.01

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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.