Home / 865,670.38-1,298,570.81-258,410.72

Finding the Fourth Proportional to 865,670.38, 1,298,570.81 and 258,410.72

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Solution

The fourth proportional to 865,670.38, 1,298,570.81 and 258,410.72 is: 387,635.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,670.38 : 1,298,570.81 = 258,410.72 : x
  2. Step 2: Convert to fraction form
    865,670.38/1,298,570.81 = 258,410.72/x
  3. Step 3: Cross multiply
    865,670.38x = 1,298,570.81 × 258,410.72
  4. Step 4: Simplify right side
    865,670.38x = 335,564,619,937.46
  5. Step 5: Solve for x
    x = 335,564,619,937.46/865,670.38
  6. Step 6: Final answer
    x = 387,635.56

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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.