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Finding the Fourth Proportional to 340,311.48, 510,467.22 and 90,987

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Solution

The fourth proportional to 340,311.48, 510,467.22 and 90,987 is: 136,480.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,311.48 : 510,467.22 = 90,987 : x
  2. Step 2: Convert to fraction form
    340,311.48/510,467.22 = 90,987/x
  3. Step 3: Cross multiply
    340,311.48x = 510,467.22 × 90,987
  4. Step 4: Simplify right side
    340,311.48x = 46,445,880,946.14
  5. Step 5: Solve for x
    x = 46,445,880,946.14/340,311.48
  6. Step 6: Final answer
    x = 136,480.50

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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.