Home / 1,087,621.60-1,631,432.40-688,712.80

Finding the Fourth Proportional to 1,087,621.60, 1,631,432.40 and 688,712.80

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Solution

The fourth proportional to 1,087,621.60, 1,631,432.40 and 688,712.80 is: 1,033,069.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087,621.60 : 1,631,432.40 = 688,712.80 : x
  2. Step 2: Convert to fraction form
    1,087,621.60/1,631,432.40 = 688,712.80/x
  3. Step 3: Cross multiply
    1,087,621.60x = 1,631,432.40 × 688,712.80
  4. Step 4: Simplify right side
    1,087,621.60x = 1,123,588,376,214.72
  5. Step 5: Solve for x
    x = 1,123,588,376,214.72/1,087,621.60
  6. Step 6: Final answer
    x = 1,033,069.20

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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.