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Finding the Fourth Proportional to 405,614.40, 608,421.60 and 248,020.80

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Solution

The fourth proportional to 405,614.40, 608,421.60 and 248,020.80 is: 372,031.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,614.40 : 608,421.60 = 248,020.80 : x
  2. Step 2: Convert to fraction form
    405,614.40/608,421.60 = 248,020.80/x
  3. Step 3: Cross multiply
    405,614.40x = 608,421.60 × 248,020.80
  4. Step 4: Simplify right side
    405,614.40x = 150,901,211,969.28
  5. Step 5: Solve for x
    x = 150,901,211,969.28/405,614.40
  6. Step 6: Final answer
    x = 372,031.20

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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.