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Finding the Fourth Proportional to 400,971, 553,339.98 and 239,832.84

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Solution

The fourth proportional to 400,971, 553,339.98 and 239,832.84 is: 330,969.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,971 : 553,339.98 = 239,832.84 : x
  2. Step 2: Convert to fraction form
    400,971/553,339.98 = 239,832.84/x
  3. Step 3: Cross multiply
    400,971x = 553,339.98 × 239,832.84
  4. Step 4: Simplify right side
    400,971x = 132,709,098,888.94
  5. Step 5: Solve for x
    x = 132,709,098,888.94/400,971
  6. Step 6: Final answer
    x = 330,969.32

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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.