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Finding the Fourth Proportional to 399,400.80, 598,117.05 and 265,556.40

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Solution

The fourth proportional to 399,400.80, 598,117.05 and 265,556.40 is: 397,680.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,400.80 : 598,117.05 = 265,556.40 : x
  2. Step 2: Convert to fraction form
    399,400.80/598,117.05 = 265,556.40/x
  3. Step 3: Cross multiply
    399,400.80x = 598,117.05 × 265,556.40
  4. Step 4: Simplify right side
    399,400.80x = 158,833,810,576.62
  5. Step 5: Solve for x
    x = 158,833,810,576.62/399,400.80
  6. Step 6: Final answer
    x = 397,680.25

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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.