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Finding the Fourth Proportional to 207,308.70, 311,291.10 and 157,445.10

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Solution

The fourth proportional to 207,308.70, 311,291.10 and 157,445.10 is: 236,416.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,308.70 : 311,291.10 = 157,445.10 : x
  2. Step 2: Convert to fraction form
    207,308.70/311,291.10 = 157,445.10/x
  3. Step 3: Cross multiply
    207,308.70x = 311,291.10 × 157,445.10
  4. Step 4: Simplify right side
    207,308.70x = 49,011,258,368.61
  5. Step 5: Solve for x
    x = 49,011,258,368.61/207,308.70
  6. Step 6: Final answer
    x = 236,416.79

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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.