Home / 1,389,979-1,918,158.06-786,367

Finding the Fourth Proportional to 1,389,979, 1,918,158.06 and 786,367

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Solution

The fourth proportional to 1,389,979, 1,918,158.06 and 786,367 is: 1,085,179.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,979 : 1,918,158.06 = 786,367 : x
  2. Step 2: Convert to fraction form
    1,389,979/1,918,158.06 = 786,367/x
  3. Step 3: Cross multiply
    1,389,979x = 1,918,158.06 × 786,367
  4. Step 4: Simplify right side
    1,389,979x = 1,508,376,199,168.02
  5. Step 5: Solve for x
    x = 1,508,376,199,168.02/1,389,979
  6. Step 6: Final answer
    x = 1,085,179.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.