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Finding the Fourth Proportional to 373,186.70, 514,978.21 and 212,019.38

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Solution

The fourth proportional to 373,186.70, 514,978.21 and 212,019.38 is: 292,575.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,186.70 : 514,978.21 = 212,019.38 : x
  2. Step 2: Convert to fraction form
    373,186.70/514,978.21 = 212,019.38/x
  3. Step 3: Cross multiply
    373,186.70x = 514,978.21 × 212,019.38
  4. Step 4: Simplify right side
    373,186.70x = 109,185,357,692.77
  5. Step 5: Solve for x
    x = 109,185,357,692.77/373,186.70
  6. Step 6: Final answer
    x = 292,575.70

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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.