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Finding the Fourth Proportional to 628,811.64, 867,978.72 and 374,157.36

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Solution

The fourth proportional to 628,811.64, 867,978.72 and 374,157.36 is: 516,467.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,811.64 : 867,978.72 = 374,157.36 : x
  2. Step 2: Convert to fraction form
    628,811.64/867,978.72 = 374,157.36/x
  3. Step 3: Cross multiply
    628,811.64x = 867,978.72 × 374,157.36
  4. Step 4: Simplify right side
    628,811.64x = 324,760,626,411.38
  5. Step 5: Solve for x
    x = 324,760,626,411.38/628,811.64
  6. Step 6: Final answer
    x = 516,467.26

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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.