Home / 1,280,477.40-1,920,716.10-642,748.20

Finding the Fourth Proportional to 1,280,477.40, 1,920,716.10 and 642,748.20

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Solution

The fourth proportional to 1,280,477.40, 1,920,716.10 and 642,748.20 is: 964,122.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280,477.40 : 1,920,716.10 = 642,748.20 : x
  2. Step 2: Convert to fraction form
    1,280,477.40/1,920,716.10 = 642,748.20/x
  3. Step 3: Cross multiply
    1,280,477.40x = 1,920,716.10 × 642,748.20
  4. Step 4: Simplify right side
    1,280,477.40x = 1,234,536,815,986.02
  5. Step 5: Solve for x
    x = 1,234,536,815,986.02/1,280,477.40
  6. Step 6: Final answer
    x = 964,122.30

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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.