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Finding the Fourth Proportional to 261,297.90, 390,955.87 and 154,739.06

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Solution

The fourth proportional to 261,297.90, 390,955.87 and 154,739.06 is: 231,521.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,297.90 : 390,955.87 = 154,739.06 : x
  2. Step 2: Convert to fraction form
    261,297.90/390,955.87 = 154,739.06/x
  3. Step 3: Cross multiply
    261,297.90x = 390,955.87 × 154,739.06
  4. Step 4: Simplify right side
    261,297.90x = 60,496,142,659.60
  5. Step 5: Solve for x
    x = 60,496,142,659.60/261,297.90
  6. Step 6: Final answer
    x = 231,521.73

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1.5x scale

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.