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Finding the Fourth Proportional to 280,868.60, 420,428.10 and 202,136.60

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Solution

The fourth proportional to 280,868.60, 420,428.10 and 202,136.60 is: 302,575.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,868.60 : 420,428.10 = 202,136.60 : x
  2. Step 2: Convert to fraction form
    280,868.60/420,428.10 = 202,136.60/x
  3. Step 3: Cross multiply
    280,868.60x = 420,428.10 × 202,136.60
  4. Step 4: Simplify right side
    280,868.60x = 84,983,906,678.46
  5. Step 5: Solve for x
    x = 84,983,906,678.46/280,868.60
  6. Step 6: Final answer
    x = 302,575.32

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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.