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Finding the Fourth Proportional to 547,280.70, 819,171.45 and 389,816.70

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Solution

The fourth proportional to 547,280.70, 819,171.45 and 389,816.70 is: 583,478.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,280.70 : 819,171.45 = 389,816.70 : x
  2. Step 2: Convert to fraction form
    547,280.70/819,171.45 = 389,816.70/x
  3. Step 3: Cross multiply
    547,280.70x = 819,171.45 × 389,816.70
  4. Step 4: Simplify right side
    547,280.70x = 319,326,711,373.22
  5. Step 5: Solve for x
    x = 319,326,711,373.22/547,280.70
  6. Step 6: Final answer
    x = 583,478.85

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1.5x scale

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.