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Finding the Fourth Proportional to 285,035.95, 392,870.22 and 216,102.58

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Solution

The fourth proportional to 285,035.95, 392,870.22 and 216,102.58 is: 297,858.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,035.95 : 392,870.22 = 216,102.58 : x
  2. Step 2: Convert to fraction form
    285,035.95/392,870.22 = 216,102.58/x
  3. Step 3: Cross multiply
    285,035.95x = 392,870.22 × 216,102.58
  4. Step 4: Simplify right side
    285,035.95x = 84,900,267,735.79
  5. Step 5: Solve for x
    x = 84,900,267,735.79/285,035.95
  6. Step 6: Final answer
    x = 297,858.11

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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.