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Finding the Fourth Proportional to 631,498.74, 871,480.80 and 345,036.60

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Solution

The fourth proportional to 631,498.74, 871,480.80 and 345,036.60 is: 476,157.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,498.74 : 871,480.80 = 345,036.60 : x
  2. Step 2: Convert to fraction form
    631,498.74/871,480.80 = 345,036.60/x
  3. Step 3: Cross multiply
    631,498.74x = 871,480.80 × 345,036.60
  4. Step 4: Simplify right side
    631,498.74x = 300,692,772,197.28
  5. Step 5: Solve for x
    x = 300,692,772,197.28/631,498.74
  6. Step 6: Final answer
    x = 476,157.36

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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.