Home / 812,372.39-1,120,720.95-489,903.29

Finding the Fourth Proportional to 812,372.39, 1,120,720.95 and 489,903.29

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Solution

The fourth proportional to 812,372.39, 1,120,720.95 and 489,903.29 is: 675,853.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,372.39 : 1,120,720.95 = 489,903.29 : x
  2. Step 2: Convert to fraction form
    812,372.39/1,120,720.95 = 489,903.29/x
  3. Step 3: Cross multiply
    812,372.39x = 1,120,720.95 × 489,903.29
  4. Step 4: Simplify right side
    812,372.39x = 549,044,874,973.32
  5. Step 5: Solve for x
    x = 549,044,874,973.32/812,372.39
  6. Step 6: Final answer
    x = 675,853.69

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Double scale
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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.