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Finding the Fourth Proportional to 403,316.80, 604,975.20 and 340,331.20

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Solution

The fourth proportional to 403,316.80, 604,975.20 and 340,331.20 is: 510,496.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,316.80 : 604,975.20 = 340,331.20 : x
  2. Step 2: Convert to fraction form
    403,316.80/604,975.20 = 340,331.20/x
  3. Step 3: Cross multiply
    403,316.80x = 604,975.20 × 340,331.20
  4. Step 4: Simplify right side
    403,316.80x = 205,891,935,786.24
  5. Step 5: Solve for x
    x = 205,891,935,786.24/403,316.80
  6. Step 6: Final answer
    x = 510,496.80

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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.