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Finding the Fourth Proportional to 402,758.38, 555,841.98 and 221,502.25

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Solution

The fourth proportional to 402,758.38, 555,841.98 and 221,502.25 is: 305,692.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,758.38 : 555,841.98 = 221,502.25 : x
  2. Step 2: Convert to fraction form
    402,758.38/555,841.98 = 221,502.25/x
  3. Step 3: Cross multiply
    402,758.38x = 555,841.98 × 221,502.25
  4. Step 4: Simplify right side
    402,758.38x = 123,120,249,214.46
  5. Step 5: Solve for x
    x = 123,120,249,214.46/402,758.38
  6. Step 6: Final answer
    x = 305,692.58

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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.