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Finding the Fourth Proportional to 442,615.21, 664,587.11 and 253,289.35

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Solution

The fourth proportional to 442,615.21, 664,587.11 and 253,289.35 is: 380,314.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,615.21 : 664,587.11 = 253,289.35 : x
  2. Step 2: Convert to fraction form
    442,615.21/664,587.11 = 253,289.35/x
  3. Step 3: Cross multiply
    442,615.21x = 664,587.11 × 253,289.35
  4. Step 4: Simplify right side
    442,615.21x = 168,332,838,574.24
  5. Step 5: Solve for x
    x = 168,332,838,574.24/442,615.21
  6. Step 6: Final answer
    x = 380,314.18

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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.