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Finding the Fourth Proportional to 400,643.61, 552,867.17 and 219,320.81

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Solution

The fourth proportional to 400,643.61, 552,867.17 and 219,320.81 is: 302,651.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,643.61 : 552,867.17 = 219,320.81 : x
  2. Step 2: Convert to fraction form
    400,643.61/552,867.17 = 219,320.81/x
  3. Step 3: Cross multiply
    400,643.61x = 552,867.17 × 219,320.81
  4. Step 4: Simplify right side
    400,643.61x = 121,255,271,685.87
  5. Step 5: Solve for x
    x = 121,255,271,685.87/400,643.61
  6. Step 6: Final answer
    x = 302,651.21

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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.