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Finding the Fourth Proportional to 402,603.01, 555,604.59 and 221,328.79

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Solution

The fourth proportional to 402,603.01, 555,604.59 and 221,328.79 is: 305,440.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,603.01 : 555,604.59 = 221,328.79 : x
  2. Step 2: Convert to fraction form
    402,603.01/555,604.59 = 221,328.79/x
  3. Step 3: Cross multiply
    402,603.01x = 555,604.59 × 221,328.79
  4. Step 4: Simplify right side
    402,603.01x = 122,971,291,623.15
  5. Step 5: Solve for x
    x = 122,971,291,623.15/402,603.01
  6. Step 6: Final answer
    x = 305,440.57

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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.