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Finding the Fourth Proportional to 400,803.97, 553,058.13 and 319,338.91

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Solution

The fourth proportional to 400,803.97, 553,058.13 and 319,338.91 is: 440,646.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,803.97 : 553,058.13 = 319,338.91 : x
  2. Step 2: Convert to fraction form
    400,803.97/553,058.13 = 319,338.91/x
  3. Step 3: Cross multiply
    400,803.97x = 553,058.13 × 319,338.91
  4. Step 4: Simplify right side
    400,803.97x = 176,612,977,382.45
  5. Step 5: Solve for x
    x = 176,612,977,382.45/400,803.97
  6. Step 6: Final answer
    x = 440,646.77

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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.