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Finding the Fourth Proportional to 356,692.98, 535,256.86 and 143,420.91

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Solution

The fourth proportional to 356,692.98, 535,256.86 and 143,420.91 is: 215,218.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,692.98 : 535,256.86 = 143,420.91 : x
  2. Step 2: Convert to fraction form
    356,692.98/535,256.86 = 143,420.91/x
  3. Step 3: Cross multiply
    356,692.98x = 535,256.86 × 143,420.91
  4. Step 4: Simplify right side
    356,692.98x = 76,767,025,944.94
  5. Step 5: Solve for x
    x = 76,767,025,944.94/356,692.98
  6. Step 6: Final answer
    x = 215,218.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.