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Finding the Fourth Proportional to 437,987.78, 656,981.67 and 105,563.78

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Solution

The fourth proportional to 437,987.78, 656,981.67 and 105,563.78 is: 158,345.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,987.78 : 656,981.67 = 105,563.78 : x
  2. Step 2: Convert to fraction form
    437,987.78/656,981.67 = 105,563.78/x
  3. Step 3: Cross multiply
    437,987.78x = 656,981.67 × 105,563.78
  4. Step 4: Simplify right side
    437,987.78x = 69,353,468,475.91
  5. Step 5: Solve for x
    x = 69,353,468,475.91/437,987.78
  6. Step 6: Final answer
    x = 158,345.67

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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.