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Finding the Fourth Proportional to 400,643.45, 552,866.04 and 219,320.30

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Solution

The fourth proportional to 400,643.45, 552,866.04 and 219,320.30 is: 302,650.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,643.45 : 552,866.04 = 219,320.30 : x
  2. Step 2: Convert to fraction form
    400,643.45/552,866.04 = 219,320.30/x
  3. Step 3: Cross multiply
    400,643.45x = 552,866.04 × 219,320.30
  4. Step 4: Simplify right side
    400,643.45x = 121,254,742,988.28
  5. Step 5: Solve for x
    x = 121,254,742,988.28/400,643.45
  6. Step 6: Final answer
    x = 302,650.01

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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.