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Finding the Fourth Proportional to 402,707.61, 555,737.93 and 221,430.94

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Solution

The fourth proportional to 402,707.61, 555,737.93 and 221,430.94 is: 305,575.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,707.61 : 555,737.93 = 221,430.94 : x
  2. Step 2: Convert to fraction form
    402,707.61/555,737.93 = 221,430.94/x
  3. Step 3: Cross multiply
    402,707.61x = 555,737.93 × 221,430.94
  4. Step 4: Simplify right side
    402,707.61x = 123,057,572,233.55
  5. Step 5: Solve for x
    x = 123,057,572,233.55/402,707.61
  6. Step 6: Final answer
    x = 305,575.48

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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.