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Finding the Fourth Proportional to 631,514.16, 871,479.28 and 345,028.08

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Solution

The fourth proportional to 631,514.16, 871,479.28 and 345,028.08 is: 476,133.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,514.16 : 871,479.28 = 345,028.08 : x
  2. Step 2: Convert to fraction form
    631,514.16/871,479.28 = 345,028.08/x
  3. Step 3: Cross multiply
    631,514.16x = 871,479.28 × 345,028.08
  4. Step 4: Simplify right side
    631,514.16x = 300,684,822,738.18
  5. Step 5: Solve for x
    x = 300,684,822,738.18/631,514.16
  6. Step 6: Final answer
    x = 476,133.14

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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.