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Finding the Fourth Proportional to 348,538.80, 521,641.80 and 306,548.40

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Solution

The fourth proportional to 348,538.80, 521,641.80 and 306,548.40 is: 458,796.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,538.80 : 521,641.80 = 306,548.40 : x
  2. Step 2: Convert to fraction form
    348,538.80/521,641.80 = 306,548.40/x
  3. Step 3: Cross multiply
    348,538.80x = 521,641.80 × 306,548.40
  4. Step 4: Simplify right side
    348,538.80x = 159,908,459,163.12
  5. Step 5: Solve for x
    x = 159,908,459,163.12/348,538.80
  6. Step 6: Final answer
    x = 458,796.72

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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.