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Finding the Fourth Proportional to 401,415.12, 605,764.80 and 388,030.32

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Solution

The fourth proportional to 401,415.12, 605,764.80 and 388,030.32 is: 585,566.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,415.12 : 605,764.80 = 388,030.32 : x
  2. Step 2: Convert to fraction form
    401,415.12/605,764.80 = 388,030.32/x
  3. Step 3: Cross multiply
    401,415.12x = 605,764.80 × 388,030.32
  4. Step 4: Simplify right side
    401,415.12x = 235,055,109,188.74
  5. Step 5: Solve for x
    x = 235,055,109,188.74/401,415.12
  6. Step 6: Final answer
    x = 585,566.16

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.