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Finding the Fourth Proportional to 400,378.72, 552,498.76 and 219,054.52

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Solution

The fourth proportional to 400,378.72, 552,498.76 and 219,054.52 is: 302,282.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,378.72 : 552,498.76 = 219,054.52 : x
  2. Step 2: Convert to fraction form
    400,378.72/552,498.76 = 219,054.52/x
  3. Step 3: Cross multiply
    400,378.72x = 552,498.76 × 219,054.52
  4. Step 4: Simplify right side
    400,378.72x = 121,027,350,672.40
  5. Step 5: Solve for x
    x = 121,027,350,672.40/400,378.72
  6. Step 6: Final answer
    x = 302,282.18

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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.