Home / 1,280,115.80-1,920,173.70-808,890.20

Finding the Fourth Proportional to 1,280,115.80, 1,920,173.70 and 808,890.20

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Solution

The fourth proportional to 1,280,115.80, 1,920,173.70 and 808,890.20 is: 1,213,335.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280,115.80 : 1,920,173.70 = 808,890.20 : x
  2. Step 2: Convert to fraction form
    1,280,115.80/1,920,173.70 = 808,890.20/x
  3. Step 3: Cross multiply
    1,280,115.80x = 1,920,173.70 × 808,890.20
  4. Step 4: Simplify right side
    1,280,115.80x = 1,553,209,688,227.74
  5. Step 5: Solve for x
    x = 1,553,209,688,227.74/1,280,115.80
  6. Step 6: Final answer
    x = 1,213,335.30

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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.