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Finding the Fourth Proportional to 890,658.66, 1,335,990.69 and 216,740.08

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Solution

The fourth proportional to 890,658.66, 1,335,990.69 and 216,740.08 is: 325,110.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,658.66 : 1,335,990.69 = 216,740.08 : x
  2. Step 2: Convert to fraction form
    890,658.66/1,335,990.69 = 216,740.08/x
  3. Step 3: Cross multiply
    890,658.66x = 1,335,990.69 × 216,740.08
  4. Step 4: Simplify right side
    890,658.66x = 289,562,729,029.86
  5. Step 5: Solve for x
    x = 289,562,729,029.86/890,658.66
  6. Step 6: Final answer
    x = 325,110.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.