Home / 388,966.60-583,406.70-318,723.40

Finding the Fourth Proportional to 388,966.60, 583,406.70 and 318,723.40

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Solution

The fourth proportional to 388,966.60, 583,406.70 and 318,723.40 is: 478,049.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,966.60 : 583,406.70 = 318,723.40 : x
  2. Step 2: Convert to fraction form
    388,966.60/583,406.70 = 318,723.40/x
  3. Step 3: Cross multiply
    388,966.60x = 583,406.70 × 318,723.40
  4. Step 4: Simplify right side
    388,966.60x = 185,945,367,006.78
  5. Step 5: Solve for x
    x = 185,945,367,006.78/388,966.60
  6. Step 6: Final answer
    x = 478,049.70

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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.