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Finding the Fourth Proportional to 343,426.60, 515,139.90 and 153,886.60

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Solution

The fourth proportional to 343,426.60, 515,139.90 and 153,886.60 is: 230,829.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,426.60 : 515,139.90 = 153,886.60 : x
  2. Step 2: Convert to fraction form
    343,426.60/515,139.90 = 153,886.60/x
  3. Step 3: Cross multiply
    343,426.60x = 515,139.90 × 153,886.60
  4. Step 4: Simplify right side
    343,426.60x = 79,273,127,735.34
  5. Step 5: Solve for x
    x = 79,273,127,735.34/343,426.60
  6. Step 6: Final answer
    x = 230,829.90

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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.