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Finding the Fourth Proportional to 342,505.40, 513,758.10 and 89,785.40

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Solution

The fourth proportional to 342,505.40, 513,758.10 and 89,785.40 is: 134,678.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,505.40 : 513,758.10 = 89,785.40 : x
  2. Step 2: Convert to fraction form
    342,505.40/513,758.10 = 89,785.40/x
  3. Step 3: Cross multiply
    342,505.40x = 513,758.10 × 89,785.40
  4. Step 4: Simplify right side
    342,505.40x = 46,127,976,511.74
  5. Step 5: Solve for x
    x = 46,127,976,511.74/342,505.40
  6. Step 6: Final answer
    x = 134,678.10

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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.