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Finding the Fourth Proportional to 1,989,230.40, 2,984,234.40 and 790,948.80

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Solution

The fourth proportional to 1,989,230.40, 2,984,234.40 and 790,948.80 is: 1,186,577.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989,230.40 : 2,984,234.40 = 790,948.80 : x
  2. Step 2: Convert to fraction form
    1,989,230.40/2,984,234.40 = 790,948.80/x
  3. Step 3: Cross multiply
    1,989,230.40x = 2,984,234.40 × 790,948.80
  4. Step 4: Simplify right side
    1,989,230.40x = 2,360,376,617,598.72
  5. Step 5: Solve for x
    x = 2,360,376,617,598.72/1,989,230.40
  6. Step 6: Final answer
    x = 1,186,577.79

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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.