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Finding the Fourth Proportional to 389,621.70, 584,432.55 and 389,621.70

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Solution

The fourth proportional to 389,621.70, 584,432.55 and 389,621.70 is: 584,432.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,621.70 : 584,432.55 = 389,621.70 : x
  2. Step 2: Convert to fraction form
    389,621.70/584,432.55 = 389,621.70/x
  3. Step 3: Cross multiply
    389,621.70x = 584,432.55 × 389,621.70
  4. Step 4: Simplify right side
    389,621.70x = 227,707,603,666.34
  5. Step 5: Solve for x
    x = 227,707,603,666.34/389,621.70
  6. Step 6: Final answer
    x = 584,432.55

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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.