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Finding the Fourth Proportional to 518,626.55, 778,523.03 and 400,820.15

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Solution

The fourth proportional to 518,626.55, 778,523.03 and 400,820.15 is: 601,680.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,626.55 : 778,523.03 = 400,820.15 : x
  2. Step 2: Convert to fraction form
    518,626.55/778,523.03 = 400,820.15/x
  3. Step 3: Cross multiply
    518,626.55x = 778,523.03 × 400,820.15
  4. Step 4: Simplify right side
    518,626.55x = 312,047,715,658.95
  5. Step 5: Solve for x
    x = 312,047,715,658.95/518,626.55
  6. Step 6: Final answer
    x = 601,680.95

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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.