Home / 400,821.57-553,128.21-219,533.45

Finding the Fourth Proportional to 400,821.57, 553,128.21 and 219,533.45

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Solution

The fourth proportional to 400,821.57, 553,128.21 and 219,533.45 is: 302,953.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,821.57 : 553,128.21 = 219,533.45 : x
  2. Step 2: Convert to fraction form
    400,821.57/553,128.21 = 219,533.45/x
  3. Step 3: Cross multiply
    400,821.57x = 553,128.21 × 219,533.45
  4. Step 4: Simplify right side
    400,821.57x = 121,430,141,467.98
  5. Step 5: Solve for x
    x = 121,430,141,467.98/400,821.57
  6. Step 6: Final answer
    x = 302,953.11

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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.