Home / 812,373.64-1,120,722.68-489,904.54

Finding the Fourth Proportional to 812,373.64, 1,120,722.68 and 489,904.54

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Solution

The fourth proportional to 812,373.64, 1,120,722.68 and 489,904.54 is: 675,855.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,373.64 : 1,120,722.68 = 489,904.54 : x
  2. Step 2: Convert to fraction form
    812,373.64/1,120,722.68 = 489,904.54/x
  3. Step 3: Cross multiply
    812,373.64x = 1,120,722.68 × 489,904.54
  4. Step 4: Simplify right side
    812,373.64x = 549,047,120,959.83
  5. Step 5: Solve for x
    x = 549,047,120,959.83/812,373.64
  6. Step 6: Final answer
    x = 675,855.42

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1.5x scale

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.