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Finding the Fourth Proportional to 375,556, 518,267.28 and 216,580

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Solution

The fourth proportional to 375,556, 518,267.28 and 216,580 is: 298,880.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    375,556 : 518,267.28 = 216,580 : x
  2. Step 2: Convert to fraction form
    375,556/518,267.28 = 216,580/x
  3. Step 3: Cross multiply
    375,556x = 518,267.28 × 216,580
  4. Step 4: Simplify right side
    375,556x = 112,246,327,502.40
  5. Step 5: Solve for x
    x = 112,246,327,502.40/375,556
  6. Step 6: Final answer
    x = 298,880.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.