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Finding the Fourth Proportional to 397,999.40, 595,443.90 and 258,031.40

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Solution

The fourth proportional to 397,999.40, 595,443.90 and 258,031.40 is: 386,038.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,999.40 : 595,443.90 = 258,031.40 : x
  2. Step 2: Convert to fraction form
    397,999.40/595,443.90 = 258,031.40/x
  3. Step 3: Cross multiply
    397,999.40x = 595,443.90 × 258,031.40
  4. Step 4: Simplify right side
    397,999.40x = 153,643,223,138.46
  5. Step 5: Solve for x
    x = 153,643,223,138.46/397,999.40
  6. Step 6: Final answer
    x = 386,038.83

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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.