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Finding the Fourth Proportional to 390,255.92, 538,480.20 and 246,915.44

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Solution

The fourth proportional to 390,255.92, 538,480.20 and 246,915.44 is: 340,697.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,255.92 : 538,480.20 = 246,915.44 : x
  2. Step 2: Convert to fraction form
    390,255.92/538,480.20 = 246,915.44/x
  3. Step 3: Cross multiply
    390,255.92x = 538,480.20 × 246,915.44
  4. Step 4: Simplify right side
    390,255.92x = 132,959,075,514.29
  5. Step 5: Solve for x
    x = 132,959,075,514.29/390,255.92
  6. Step 6: Final answer
    x = 340,697.14

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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.