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Finding the Fourth Proportional to 258,492.80, 386,864.40 and 258,492.80

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Solution

The fourth proportional to 258,492.80, 386,864.40 and 258,492.80 is: 386,864.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,492.80 : 386,864.40 = 258,492.80 : x
  2. Step 2: Convert to fraction form
    258,492.80/386,864.40 = 258,492.80/x
  3. Step 3: Cross multiply
    258,492.80x = 386,864.40 × 258,492.80
  4. Step 4: Simplify right side
    258,492.80x = 100,001,661,976.32
  5. Step 5: Solve for x
    x = 100,001,661,976.32/258,492.80
  6. Step 6: Final answer
    x = 386,864.40

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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.