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Finding the Fourth Proportional to 490,978.20, 736,467.30 and 158,554.20

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Solution

The fourth proportional to 490,978.20, 736,467.30 and 158,554.20 is: 237,831.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,978.20 : 736,467.30 = 158,554.20 : x
  2. Step 2: Convert to fraction form
    490,978.20/736,467.30 = 158,554.20/x
  3. Step 3: Cross multiply
    490,978.20x = 736,467.30 × 158,554.20
  4. Step 4: Simplify right side
    490,978.20x = 116,769,983,577.66
  5. Step 5: Solve for x
    x = 116,769,983,577.66/490,978.20
  6. Step 6: Final answer
    x = 237,831.30

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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.