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Finding the Fourth Proportional to 375,618.78, 518,123.61 and 306,808.23

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Solution

The fourth proportional to 375,618.78, 518,123.61 and 306,808.23 is: 423,207.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    375,618.78 : 518,123.61 = 306,808.23 : x
  2. Step 2: Convert to fraction form
    375,618.78/518,123.61 = 306,808.23/x
  3. Step 3: Cross multiply
    375,618.78x = 518,123.61 × 306,808.23
  4. Step 4: Simplify right side
    375,618.78x = 158,964,587,705.31
  5. Step 5: Solve for x
    x = 158,964,587,705.31/375,618.78
  6. Step 6: Final answer
    x = 423,207.24

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1.5x scale

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.