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Finding the Fourth Proportional to 347,711.70, 521,567.55 and 247,328.40

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Solution

The fourth proportional to 347,711.70, 521,567.55 and 247,328.40 is: 370,992.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,711.70 : 521,567.55 = 247,328.40 : x
  2. Step 2: Convert to fraction form
    347,711.70/521,567.55 = 247,328.40/x
  3. Step 3: Cross multiply
    347,711.70x = 521,567.55 × 247,328.40
  4. Step 4: Simplify right side
    347,711.70x = 128,998,467,633.42
  5. Step 5: Solve for x
    x = 128,998,467,633.42/347,711.70
  6. Step 6: Final answer
    x = 370,992.60

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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.