Home / 990,994.35-1,486,171.65-280,831.71

Finding the Fourth Proportional to 990,994.35, 1,486,171.65 and 280,831.71

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Solution

The fourth proportional to 990,994.35, 1,486,171.65 and 280,831.71 is: 421,156.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,994.35 : 1,486,171.65 = 280,831.71 : x
  2. Step 2: Convert to fraction form
    990,994.35/1,486,171.65 = 280,831.71/x
  3. Step 3: Cross multiply
    990,994.35x = 1,486,171.65 × 280,831.71
  4. Step 4: Simplify right side
    990,994.35x = 417,364,125,823.02
  5. Step 5: Solve for x
    x = 417,364,125,823.02/990,994.35
  6. Step 6: Final answer
    x = 421,156.92

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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.