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Finding the Fourth Proportional to 631,623.60, 871,630 and 345,137.08

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Solution

The fourth proportional to 631,623.60, 871,630 and 345,137.08 is: 476,283.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,623.60 : 871,630 = 345,137.08 : x
  2. Step 2: Convert to fraction form
    631,623.60/871,630 = 345,137.08/x
  3. Step 3: Cross multiply
    631,623.60x = 871,630 × 345,137.08
  4. Step 4: Simplify right side
    631,623.60x = 300,831,833,040.40
  5. Step 5: Solve for x
    x = 300,831,833,040.40/631,623.60
  6. Step 6: Final answer
    x = 476,283.40

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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.