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Finding the Fourth Proportional to 710,856.48, 980,981.82 and 388,567.84

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Solution

The fourth proportional to 710,856.48, 980,981.82 and 388,567.84 is: 536,223.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,856.48 : 980,981.82 = 388,567.84 : x
  2. Step 2: Convert to fraction form
    710,856.48/980,981.82 = 388,567.84/x
  3. Step 3: Cross multiply
    710,856.48x = 980,981.82 × 388,567.84
  4. Step 4: Simplify right side
    710,856.48x = 381,177,986,876.67
  5. Step 5: Solve for x
    x = 381,177,986,876.67/710,856.48
  6. Step 6: Final answer
    x = 536,223.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.