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Finding the Fourth Proportional to 228,808.48, 315,742.80 and 133,330.72

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Solution

The fourth proportional to 228,808.48, 315,742.80 and 133,330.72 is: 183,988.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,808.48 : 315,742.80 = 133,330.72 : x
  2. Step 2: Convert to fraction form
    228,808.48/315,742.80 = 133,330.72/x
  3. Step 3: Cross multiply
    228,808.48x = 315,742.80 × 133,330.72
  4. Step 4: Simplify right side
    228,808.48x = 42,098,214,858.82
  5. Step 5: Solve for x
    x = 42,098,214,858.82/228,808.48
  6. Step 6: Final answer
    x = 183,988.88

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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.