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Finding the Fourth Proportional to 285,421.20, 427,840.20 and 167,031.60

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Solution

The fourth proportional to 285,421.20, 427,840.20 and 167,031.60 is: 250,376.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,421.20 : 427,840.20 = 167,031.60 : x
  2. Step 2: Convert to fraction form
    285,421.20/427,840.20 = 167,031.60/x
  3. Step 3: Cross multiply
    285,421.20x = 427,840.20 × 167,031.60
  4. Step 4: Simplify right side
    285,421.20x = 71,462,833,150.32
  5. Step 5: Solve for x
    x = 71,462,833,150.32/285,421.20
  6. Step 6: Final answer
    x = 250,376.75

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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.