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Finding the Fourth Proportional to 508,640.40, 762,960.60 and 134,663.40

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Solution

The fourth proportional to 508,640.40, 762,960.60 and 134,663.40 is: 201,995.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,640.40 : 762,960.60 = 134,663.40 : x
  2. Step 2: Convert to fraction form
    508,640.40/762,960.60 = 134,663.40/x
  3. Step 3: Cross multiply
    508,640.40x = 762,960.60 × 134,663.40
  4. Step 4: Simplify right side
    508,640.40x = 102,742,868,462.04
  5. Step 5: Solve for x
    x = 102,742,868,462.04/508,640.40
  6. Step 6: Final answer
    x = 201,995.10

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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.