Home / 1,391,816.75-1,920,616.16-818,746.20

Finding the Fourth Proportional to 1,391,816.75, 1,920,616.16 and 818,746.20

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Solution

The fourth proportional to 1,391,816.75, 1,920,616.16 and 818,746.20 is: 1,129,816.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,816.75 : 1,920,616.16 = 818,746.20 : x
  2. Step 2: Convert to fraction form
    1,391,816.75/1,920,616.16 = 818,746.20/x
  3. Step 3: Cross multiply
    1,391,816.75x = 1,920,616.16 × 818,746.20
  4. Step 4: Simplify right side
    1,391,816.75x = 1,572,497,178,564.86
  5. Step 5: Solve for x
    x = 1,572,497,178,564.86/1,391,816.75
  6. Step 6: Final answer
    x = 1,129,816.25

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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.