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Finding the Fourth Proportional to 240,457.80, 331,802.90 and 138,516.60

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Solution

The fourth proportional to 240,457.80, 331,802.90 and 138,516.60 is: 191,136.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    240,457.80 : 331,802.90 = 138,516.60 : x
  2. Step 2: Convert to fraction form
    240,457.80/331,802.90 = 138,516.60/x
  3. Step 3: Cross multiply
    240,457.80x = 331,802.90 × 138,516.60
  4. Step 4: Simplify right side
    240,457.80x = 45,960,209,578.14
  5. Step 5: Solve for x
    x = 45,960,209,578.14/240,457.80
  6. Step 6: Final answer
    x = 191,136.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.