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Finding the Fourth Proportional to 320,605.88, 442,612.69 and 240,004.40

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Solution

The fourth proportional to 320,605.88, 442,612.69 and 240,004.40 is: 331,338.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,605.88 : 442,612.69 = 240,004.40 : x
  2. Step 2: Convert to fraction form
    320,605.88/442,612.69 = 240,004.40/x
  3. Step 3: Cross multiply
    320,605.88x = 442,612.69 × 240,004.40
  4. Step 4: Simplify right side
    320,605.88x = 106,228,990,282.76
  5. Step 5: Solve for x
    x = 106,228,990,282.76/320,605.88
  6. Step 6: Final answer
    x = 331,338.25

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1.5x scale

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.