Home / 509,090.03-702,521.51-305,253.42

Finding the Fourth Proportional to 509,090.03, 702,521.51 and 305,253.42

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Solution

The fourth proportional to 509,090.03, 702,521.51 and 305,253.42 is: 421,236.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,090.03 : 702,521.51 = 305,253.42 : x
  2. Step 2: Convert to fraction form
    509,090.03/702,521.51 = 305,253.42/x
  3. Step 3: Cross multiply
    509,090.03x = 702,521.51 × 305,253.42
  4. Step 4: Simplify right side
    509,090.03x = 214,447,092,024.80
  5. Step 5: Solve for x
    x = 214,447,092,024.80/509,090.03
  6. Step 6: Final answer
    x = 421,236.09

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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.