Home / 1,290,172.40-1,935,028.20-816,009.20

Finding the Fourth Proportional to 1,290,172.40, 1,935,028.20 and 816,009.20

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Solution

The fourth proportional to 1,290,172.40, 1,935,028.20 and 816,009.20 is: 1,223,868.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,172.40 : 1,935,028.20 = 816,009.20 : x
  2. Step 2: Convert to fraction form
    1,290,172.40/1,935,028.20 = 816,009.20/x
  3. Step 3: Cross multiply
    1,290,172.40x = 1,935,028.20 × 816,009.20
  4. Step 4: Simplify right side
    1,290,172.40x = 1,579,000,813,459.44
  5. Step 5: Solve for x
    x = 1,579,000,813,459.44/1,290,172.40
  6. Step 6: Final answer
    x = 1,223,868.08

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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.