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Finding the Fourth Proportional to 715,984.02, 988,054.38 and 421,804.53

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Solution

The fourth proportional to 715,984.02, 988,054.38 and 421,804.53 is: 582,088.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,984.02 : 988,054.38 = 421,804.53 : x
  2. Step 2: Convert to fraction form
    715,984.02/988,054.38 = 421,804.53/x
  3. Step 3: Cross multiply
    715,984.02x = 988,054.38 × 421,804.53
  4. Step 4: Simplify right side
    715,984.02x = 416,765,813,370.34
  5. Step 5: Solve for x
    x = 416,765,813,370.34/715,984.02
  6. Step 6: Final answer
    x = 582,088.15

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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.