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Finding the Fourth Proportional to 315,120.76, 435,027.18 and 243,339.64

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Solution

The fourth proportional to 315,120.76, 435,027.18 and 243,339.64 is: 335,932.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,120.76 : 435,027.18 = 243,339.64 : x
  2. Step 2: Convert to fraction form
    315,120.76/435,027.18 = 243,339.64/x
  3. Step 3: Cross multiply
    315,120.76x = 435,027.18 × 243,339.64
  4. Step 4: Simplify right side
    315,120.76x = 105,859,357,371.42
  5. Step 5: Solve for x
    x = 105,859,357,371.42/315,120.76
  6. Step 6: Final answer
    x = 335,932.67

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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.