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Finding the Fourth Proportional to 418,349.48, 627,518.78 and 102,809.16

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Solution

The fourth proportional to 418,349.48, 627,518.78 and 102,809.16 is: 154,212.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,349.48 : 627,518.78 = 102,809.16 : x
  2. Step 2: Convert to fraction form
    418,349.48/627,518.78 = 102,809.16/x
  3. Step 3: Cross multiply
    418,349.48x = 627,518.78 × 102,809.16
  4. Step 4: Simplify right side
    418,349.48x = 64,514,678,656.02
  5. Step 5: Solve for x
    x = 64,514,678,656.02/418,349.48
  6. Step 6: Final answer
    x = 154,212.40

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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.