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Finding the Fourth Proportional to 253,285.80, 349,503.96 and 145,890.76

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Solution

The fourth proportional to 253,285.80, 349,503.96 and 145,890.76 is: 201,311.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,285.80 : 349,503.96 = 145,890.76 : x
  2. Step 2: Convert to fraction form
    253,285.80/349,503.96 = 145,890.76/x
  3. Step 3: Cross multiply
    253,285.80x = 349,503.96 × 145,890.76
  4. Step 4: Simplify right side
    253,285.80x = 50,989,398,347.41
  5. Step 5: Solve for x
    x = 50,989,398,347.41/253,285.80
  6. Step 6: Final answer
    x = 201,311.71

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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.