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Finding the Fourth Proportional to 628,220, 942,632.40 and 312,704.48

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Solution

The fourth proportional to 628,220, 942,632.40 and 312,704.48 is: 469,207.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,220 : 942,632.40 = 312,704.48 : x
  2. Step 2: Convert to fraction form
    628,220/942,632.40 = 312,704.48/x
  3. Step 3: Cross multiply
    628,220x = 942,632.40 × 312,704.48
  4. Step 4: Simplify right side
    628,220x = 294,765,374,473.15
  5. Step 5: Solve for x
    x = 294,765,374,473.15/628,220
  6. Step 6: Final answer
    x = 469,207.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.