Home / 1,389,970.75-1,918,146.67-786,358.75

Finding the Fourth Proportional to 1,389,970.75, 1,918,146.67 and 786,358.75

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Solution

The fourth proportional to 1,389,970.75, 1,918,146.67 and 786,358.75 is: 1,085,167.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,970.75 : 1,918,146.67 = 786,358.75 : x
  2. Step 2: Convert to fraction form
    1,389,970.75/1,918,146.67 = 786,358.75/x
  3. Step 3: Cross multiply
    1,389,970.75x = 1,918,146.67 × 786,358.75
  4. Step 4: Simplify right side
    1,389,970.75x = 1,508,351,417,737.86
  5. Step 5: Solve for x
    x = 1,508,351,417,737.86/1,389,970.75
  6. Step 6: Final answer
    x = 1,085,167.74

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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.