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Finding the Fourth Proportional to 513,345.81, 769,959.85 and 134,303.11

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Solution

The fourth proportional to 513,345.81, 769,959.85 and 134,303.11 is: 201,439.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,345.81 : 769,959.85 = 134,303.11 : x
  2. Step 2: Convert to fraction form
    513,345.81/769,959.85 = 134,303.11/x
  3. Step 3: Cross multiply
    513,345.81x = 769,959.85 × 134,303.11
  4. Step 4: Simplify right side
    513,345.81x = 103,408,002,430.13
  5. Step 5: Solve for x
    x = 103,408,002,430.13/513,345.81
  6. Step 6: Final answer
    x = 201,439.26

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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.