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Finding the Fourth Proportional to 390,600.80, 584,518.80 and 266,184.80

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Solution

The fourth proportional to 390,600.80, 584,518.80 and 266,184.80 is: 398,335.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,600.80 : 584,518.80 = 266,184.80 : x
  2. Step 2: Convert to fraction form
    390,600.80/584,518.80 = 266,184.80/x
  3. Step 3: Cross multiply
    390,600.80x = 584,518.80 × 266,184.80
  4. Step 4: Simplify right side
    390,600.80x = 155,590,019,874.24
  5. Step 5: Solve for x
    x = 155,590,019,874.24/390,600.80
  6. Step 6: Final answer
    x = 398,335.13

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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.