Home / 812,374.89-1,120,724.40-489,905.79

Finding the Fourth Proportional to 812,374.89, 1,120,724.40 and 489,905.79

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Solution

The fourth proportional to 812,374.89, 1,120,724.40 and 489,905.79 is: 675,857.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,374.89 : 1,120,724.40 = 489,905.79 : x
  2. Step 2: Convert to fraction form
    812,374.89/1,120,724.40 = 489,905.79/x
  3. Step 3: Cross multiply
    812,374.89x = 1,120,724.40 × 489,905.79
  4. Step 4: Simplify right side
    812,374.89x = 549,049,372,554.28
  5. Step 5: Solve for x
    x = 549,049,372,554.28/812,374.89
  6. Step 6: Final answer
    x = 675,857.14

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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.