Home / 385,131.48-531,495.90-215,365.20

Finding the Fourth Proportional to 385,131.48, 531,495.90 and 215,365.20

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Solution

The fourth proportional to 385,131.48, 531,495.90 and 215,365.20 is: 297,212.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,131.48 : 531,495.90 = 215,365.20 : x
  2. Step 2: Convert to fraction form
    385,131.48/531,495.90 = 215,365.20/x
  3. Step 3: Cross multiply
    385,131.48x = 531,495.90 × 215,365.20
  4. Step 4: Simplify right side
    385,131.48x = 114,465,720,802.68
  5. Step 5: Solve for x
    x = 114,465,720,802.68/385,131.48
  6. Step 6: Final answer
    x = 297,212.06

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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.