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Finding the Fourth Proportional to 628,063.16, 866,708.62 and 356,155.80

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Solution

The fourth proportional to 628,063.16, 866,708.62 and 356,155.80 is: 491,484.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,063.16 : 866,708.62 = 356,155.80 : x
  2. Step 2: Convert to fraction form
    628,063.16/866,708.62 = 356,155.80/x
  3. Step 3: Cross multiply
    628,063.16x = 866,708.62 × 356,155.80
  4. Step 4: Simplify right side
    628,063.16x = 308,683,301,923.00
  5. Step 5: Solve for x
    x = 308,683,301,923.00/628,063.16
  6. Step 6: Final answer
    x = 491,484.49

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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.