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Finding the Fourth Proportional to 291,636.80, 437,455.17 and 70,020.80

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Solution

The fourth proportional to 291,636.80, 437,455.17 and 70,020.80 is: 105,031.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,636.80 : 437,455.17 = 70,020.80 : x
  2. Step 2: Convert to fraction form
    291,636.80/437,455.17 = 70,020.80/x
  3. Step 3: Cross multiply
    291,636.80x = 437,455.17 × 70,020.80
  4. Step 4: Simplify right side
    291,636.80x = 30,630,960,967.54
  5. Step 5: Solve for x
    x = 30,630,960,967.54/291,636.80
  6. Step 6: Final answer
    x = 105,031.19

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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.