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Finding the Fourth Proportional to 518,501.64, 715,554.30 and 289,058.88

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Solution

The fourth proportional to 518,501.64, 715,554.30 and 289,058.88 is: 398,913.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,501.64 : 715,554.30 = 289,058.88 : x
  2. Step 2: Convert to fraction form
    518,501.64/715,554.30 = 289,058.88/x
  3. Step 3: Cross multiply
    518,501.64x = 715,554.30 × 289,058.88
  4. Step 4: Simplify right side
    518,501.64x = 206,837,324,537.18
  5. Step 5: Solve for x
    x = 206,837,324,537.18/518,501.64
  6. Step 6: Final answer
    x = 398,913.54

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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.