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Finding the Fourth Proportional to 285,263.15, 392,868.95 and 220,493.77

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Solution

The fourth proportional to 285,263.15, 392,868.95 and 220,493.77 is: 303,667.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,263.15 : 392,868.95 = 220,493.77 : x
  2. Step 2: Convert to fraction form
    285,263.15/392,868.95 = 220,493.77/x
  3. Step 3: Cross multiply
    285,263.15x = 392,868.95 × 220,493.77
  4. Step 4: Simplify right side
    285,263.15x = 86,625,153,816.80
  5. Step 5: Solve for x
    x = 86,625,153,816.80/285,263.15
  6. Step 6: Final answer
    x = 303,667.53

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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.