Home / 1,389,960-1,918,131.84-786,348

Finding the Fourth Proportional to 1,389,960, 1,918,131.84 and 786,348

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Solution

The fourth proportional to 1,389,960, 1,918,131.84 and 786,348 is: 1,085,152.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,960 : 1,918,131.84 = 786,348 : x
  2. Step 2: Convert to fraction form
    1,389,960/1,918,131.84 = 786,348/x
  3. Step 3: Cross multiply
    1,389,960x = 1,918,131.84 × 786,348
  4. Step 4: Simplify right side
    1,389,960x = 1,508,319,136,120.32
  5. Step 5: Solve for x
    x = 1,508,319,136,120.32/1,389,960
  6. Step 6: Final answer
    x = 1,085,152.91

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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.