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Finding the Fourth Proportional to 262,136.70, 392,913.45 and 143,892.90

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Solution

The fourth proportional to 262,136.70, 392,913.45 and 143,892.90 is: 215,679.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,136.70 : 392,913.45 = 143,892.90 : x
  2. Step 2: Convert to fraction form
    262,136.70/392,913.45 = 143,892.90/x
  3. Step 3: Cross multiply
    262,136.70x = 392,913.45 × 143,892.90
  4. Step 4: Simplify right side
    262,136.70x = 56,537,455,769.51
  5. Step 5: Solve for x
    x = 56,537,455,769.51/262,136.70
  6. Step 6: Final answer
    x = 215,679.28

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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.