Home / 659,981.40-989,076.63-280,426.20

Finding the Fourth Proportional to 659,981.40, 989,076.63 and 280,426.20

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Solution

The fourth proportional to 659,981.40, 989,076.63 and 280,426.20 is: 420,258.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,981.40 : 989,076.63 = 280,426.20 : x
  2. Step 2: Convert to fraction form
    659,981.40/989,076.63 = 280,426.20/x
  3. Step 3: Cross multiply
    659,981.40x = 989,076.63 × 280,426.20
  4. Step 4: Simplify right side
    659,981.40x = 277,363,000,859.71
  5. Step 5: Solve for x
    x = 277,363,000,859.71/659,981.40
  6. Step 6: Final answer
    x = 420,258.81

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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.