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Finding the Fourth Proportional to 989,832.80, 1,482,124.80 and 779,880.80

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Solution

The fourth proportional to 989,832.80, 1,482,124.80 and 779,880.80 is: 1,167,753.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,832.80 : 1,482,124.80 = 779,880.80 : x
  2. Step 2: Convert to fraction form
    989,832.80/1,482,124.80 = 779,880.80/x
  3. Step 3: Cross multiply
    989,832.80x = 1,482,124.80 × 779,880.80
  4. Step 4: Simplify right side
    989,832.80x = 1,155,880,674,723.84
  5. Step 5: Solve for x
    x = 1,155,880,674,723.84/989,832.80
  6. Step 6: Final answer
    x = 1,167,753.46

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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.