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Finding the Fourth Proportional to 348,528.80, 521,626.80 and 306,538.40

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Solution

The fourth proportional to 348,528.80, 521,626.80 and 306,538.40 is: 458,781.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,528.80 : 521,626.80 = 306,538.40 : x
  2. Step 2: Convert to fraction form
    348,528.80/521,626.80 = 306,538.40/x
  3. Step 3: Cross multiply
    348,528.80x = 521,626.80 × 306,538.40
  4. Step 4: Simplify right side
    348,528.80x = 159,898,644,669.12
  5. Step 5: Solve for x
    x = 159,898,644,669.12/348,528.80
  6. Step 6: Final answer
    x = 458,781.73

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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.