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Finding the Fourth Proportional to 343,672.80, 515,071.80 and 306,056.40

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Solution

The fourth proportional to 343,672.80, 515,071.80 and 306,056.40 is: 458,695.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,672.80 : 515,071.80 = 306,056.40 : x
  2. Step 2: Convert to fraction form
    343,672.80/515,071.80 = 306,056.40/x
  3. Step 3: Cross multiply
    343,672.80x = 515,071.80 × 306,056.40
  4. Step 4: Simplify right side
    343,672.80x = 157,641,020,849.52
  5. Step 5: Solve for x
    x = 157,641,020,849.52/343,672.80
  6. Step 6: Final answer
    x = 458,695.08

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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.