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Finding the Fourth Proportional to 343,391.60, 515,017.26 and 130,085.98

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Solution

The fourth proportional to 343,391.60, 515,017.26 and 130,085.98 is: 195,102.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,391.60 : 515,017.26 = 130,085.98 : x
  2. Step 2: Convert to fraction form
    343,391.60/515,017.26 = 130,085.98/x
  3. Step 3: Cross multiply
    343,391.60x = 515,017.26 × 130,085.98
  4. Step 4: Simplify right side
    343,391.60x = 66,996,523,696.47
  5. Step 5: Solve for x
    x = 66,996,523,696.47/343,391.60
  6. Step 6: Final answer
    x = 195,102.39

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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.