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Finding the Fourth Proportional to 641,668.61, 962,170.67 and 342,068.72

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Solution

The fourth proportional to 641,668.61, 962,170.67 and 342,068.72 is: 512,925.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,668.61 : 962,170.67 = 342,068.72 : x
  2. Step 2: Convert to fraction form
    641,668.61/962,170.67 = 342,068.72/x
  3. Step 3: Cross multiply
    641,668.61x = 962,170.67 × 342,068.72
  4. Step 4: Simplify right side
    641,668.61x = 329,128,482,987.25
  5. Step 5: Solve for x
    x = 329,128,482,987.25/641,668.61
  6. Step 6: Final answer
    x = 512,925.96

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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.