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Finding the Fourth Proportional to 309,263.90, 426,989.76 and 237,515.72

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Solution

The fourth proportional to 309,263.90, 426,989.76 and 237,515.72 is: 327,929.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,263.90 : 426,989.76 = 237,515.72 : x
  2. Step 2: Convert to fraction form
    309,263.90/426,989.76 = 237,515.72/x
  3. Step 3: Cross multiply
    309,263.90x = 426,989.76 × 237,515.72
  4. Step 4: Simplify right side
    309,263.90x = 101,416,780,279.03
  5. Step 5: Solve for x
    x = 101,416,780,279.03/309,263.90
  6. Step 6: Final answer
    x = 327,929.58

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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.