Home / 989,708.40-1,484,416.80-279,808.20

Finding the Fourth Proportional to 989,708.40, 1,484,416.80 and 279,808.20

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Solution

The fourth proportional to 989,708.40, 1,484,416.80 and 279,808.20 is: 419,671.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,708.40 : 1,484,416.80 = 279,808.20 : x
  2. Step 2: Convert to fraction form
    989,708.40/1,484,416.80 = 279,808.20/x
  3. Step 3: Cross multiply
    989,708.40x = 1,484,416.80 × 279,808.20
  4. Step 4: Simplify right side
    989,708.40x = 415,351,992,857.76
  5. Step 5: Solve for x
    x = 415,351,992,857.76/989,708.40
  6. Step 6: Final answer
    x = 419,671.08

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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.