Home / 631,623.20-871,642.20-345,143.28

Finding the Fourth Proportional to 631,623.20, 871,642.20 and 345,143.28

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Solution

The fourth proportional to 631,623.20, 871,642.20 and 345,143.28 is: 476,298.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,623.20 : 871,642.20 = 345,143.28 : x
  2. Step 2: Convert to fraction form
    631,623.20/871,642.20 = 345,143.28/x
  3. Step 3: Cross multiply
    631,623.20x = 871,642.20 × 345,143.28
  4. Step 4: Simplify right side
    631,623.20x = 300,841,447,894.42
  5. Step 5: Solve for x
    x = 300,841,447,894.42/631,623.20
  6. Step 6: Final answer
    x = 476,298.92

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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.