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Finding the Fourth Proportional to 400,587, 552,810.06 and 221,739

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Solution

The fourth proportional to 400,587, 552,810.06 and 221,739 is: 305,999.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,587 : 552,810.06 = 221,739 : x
  2. Step 2: Convert to fraction form
    400,587/552,810.06 = 221,739/x
  3. Step 3: Cross multiply
    400,587x = 552,810.06 × 221,739
  4. Step 4: Simplify right side
    400,587x = 122,579,549,894.34
  5. Step 5: Solve for x
    x = 122,579,549,894.34/400,587
  6. Step 6: Final answer
    x = 305,999.82

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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.