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Finding the Fourth Proportional to 402,818.84, 555,878.90 and 221,530.77

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Solution

The fourth proportional to 402,818.84, 555,878.90 and 221,530.77 is: 305,706.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,818.84 : 555,878.90 = 221,530.77 : x
  2. Step 2: Convert to fraction form
    402,818.84/555,878.90 = 221,530.77/x
  3. Step 3: Cross multiply
    402,818.84x = 555,878.90 × 221,530.77
  4. Step 4: Simplify right side
    402,818.84x = 123,144,280,743.75
  5. Step 5: Solve for x
    x = 123,144,280,743.75/402,818.84
  6. Step 6: Final answer
    x = 305,706.36

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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.