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Finding the Fourth Proportional to 400,643.42, 552,866.92 and 219,320.63

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Solution

The fourth proportional to 400,643.42, 552,866.92 and 219,320.63 is: 302,650.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,643.42 : 552,866.92 = 219,320.63 : x
  2. Step 2: Convert to fraction form
    400,643.42/552,866.92 = 219,320.63/x
  3. Step 3: Cross multiply
    400,643.42x = 552,866.92 × 219,320.63
  4. Step 4: Simplify right side
    400,643.42x = 121,255,119,961.17
  5. Step 5: Solve for x
    x = 121,255,119,961.17/400,643.42
  6. Step 6: Final answer
    x = 302,650.97

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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.