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Finding the Fourth Proportional to 298,280.40, 447,421.52 and 73,640.87

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Solution

The fourth proportional to 298,280.40, 447,421.52 and 73,640.87 is: 110,461.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,280.40 : 447,421.52 = 73,640.87 : x
  2. Step 2: Convert to fraction form
    298,280.40/447,421.52 = 73,640.87/x
  3. Step 3: Cross multiply
    298,280.40x = 447,421.52 × 73,640.87
  4. Step 4: Simplify right side
    298,280.40x = 32,948,507,384.21
  5. Step 5: Solve for x
    x = 32,948,507,384.21/298,280.40
  6. Step 6: Final answer
    x = 110,461.52

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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.