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Finding the Fourth Proportional to 542,433.70, 748,840.17 and 421,303.78

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Solution

The fourth proportional to 542,433.70, 748,840.17 and 421,303.78 is: 581,617.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,433.70 : 748,840.17 = 421,303.78 : x
  2. Step 2: Convert to fraction form
    542,433.70/748,840.17 = 421,303.78/x
  3. Step 3: Cross multiply
    542,433.70x = 748,840.17 × 421,303.78
  4. Step 4: Simplify right side
    542,433.70x = 315,489,194,236.84
  5. Step 5: Solve for x
    x = 315,489,194,236.84/542,433.70
  6. Step 6: Final answer
    x = 581,617.98

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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.