Home / 1,280,431.40-1,920,647.10-642,702.20

Finding the Fourth Proportional to 1,280,431.40, 1,920,647.10 and 642,702.20

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Solution

The fourth proportional to 1,280,431.40, 1,920,647.10 and 642,702.20 is: 964,053.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280,431.40 : 1,920,647.10 = 642,702.20 : x
  2. Step 2: Convert to fraction form
    1,280,431.40/1,920,647.10 = 642,702.20/x
  3. Step 3: Cross multiply
    1,280,431.40x = 1,920,647.10 × 642,702.20
  4. Step 4: Simplify right side
    1,280,431.40x = 1,234,404,116,593.62
  5. Step 5: Solve for x
    x = 1,234,404,116,593.62/1,280,431.40
  6. Step 6: Final answer
    x = 964,053.30

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Similar ratio
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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.