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Finding the Fourth Proportional to 405,059.40, 607,516.20 and 255,031.20

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Solution

The fourth proportional to 405,059.40, 607,516.20 and 255,031.20 is: 382,500.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,059.40 : 607,516.20 = 255,031.20 : x
  2. Step 2: Convert to fraction form
    405,059.40/607,516.20 = 255,031.20/x
  3. Step 3: Cross multiply
    405,059.40x = 607,516.20 × 255,031.20
  4. Step 4: Simplify right side
    405,059.40x = 154,935,585,505.44
  5. Step 5: Solve for x
    x = 154,935,585,505.44/405,059.40
  6. Step 6: Final answer
    x = 382,500.90

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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.