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Finding the Fourth Proportional to 815,559.76, 1,223,339.64 and 254,642.32

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Solution

The fourth proportional to 815,559.76, 1,223,339.64 and 254,642.32 is: 381,963.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,559.76 : 1,223,339.64 = 254,642.32 : x
  2. Step 2: Convert to fraction form
    815,559.76/1,223,339.64 = 254,642.32/x
  3. Step 3: Cross multiply
    815,559.76x = 1,223,339.64 × 254,642.32
  4. Step 4: Simplify right side
    815,559.76x = 311,514,044,077.57
  5. Step 5: Solve for x
    x = 311,514,044,077.57/815,559.76
  6. Step 6: Final answer
    x = 381,963.48

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.