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Finding the Fourth Proportional to 403,964.40, 605,557.80 and 313,957.20

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Solution

The fourth proportional to 403,964.40, 605,557.80 and 313,957.20 is: 470,633.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,964.40 : 605,557.80 = 313,957.20 : x
  2. Step 2: Convert to fraction form
    403,964.40/605,557.80 = 313,957.20/x
  3. Step 3: Cross multiply
    403,964.40x = 605,557.80 × 313,957.20
  4. Step 4: Simplify right side
    403,964.40x = 190,119,231,326.16
  5. Step 5: Solve for x
    x = 190,119,231,326.16/403,964.40
  6. Step 6: Final answer
    x = 470,633.63

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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.