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Finding the Fourth Proportional to 258,406.70, 387,215.34 and 108,565.07

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Solution

The fourth proportional to 258,406.70, 387,215.34 and 108,565.07 is: 162,681.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,406.70 : 387,215.34 = 108,565.07 : x
  2. Step 2: Convert to fraction form
    258,406.70/387,215.34 = 108,565.07/x
  3. Step 3: Cross multiply
    258,406.70x = 387,215.34 × 108,565.07
  4. Step 4: Simplify right side
    258,406.70x = 42,038,058,556.10
  5. Step 5: Solve for x
    x = 42,038,058,556.10/258,406.70
  6. Step 6: Final answer
    x = 162,681.77

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1.5x scale

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.