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Finding the Fourth Proportional to 289,018.02, 398,978.76 and 168,115.26

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Solution

The fourth proportional to 289,018.02, 398,978.76 and 168,115.26 is: 232,076.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,018.02 : 398,978.76 = 168,115.26 : x
  2. Step 2: Convert to fraction form
    289,018.02/398,978.76 = 168,115.26/x
  3. Step 3: Cross multiply
    289,018.02x = 398,978.76 × 168,115.26
  4. Step 4: Simplify right side
    289,018.02x = 67,074,417,971.88
  5. Step 5: Solve for x
    x = 67,074,417,971.88/289,018.02
  6. Step 6: Final answer
    x = 232,076.94

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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.