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Finding the Fourth Proportional to 402,602.01, 555,603.21 and 221,327.79

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Solution

The fourth proportional to 402,602.01, 555,603.21 and 221,327.79 is: 305,439.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,602.01 : 555,603.21 = 221,327.79 : x
  2. Step 2: Convert to fraction form
    402,602.01/555,603.21 = 221,327.79/x
  3. Step 3: Cross multiply
    402,602.01x = 555,603.21 × 221,327.79
  4. Step 4: Simplify right side
    402,602.01x = 122,970,430,586.21
  5. Step 5: Solve for x
    x = 122,970,430,586.21/402,602.01
  6. Step 6: Final answer
    x = 305,439.19

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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.