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Finding the Fourth Proportional to 1,000,459, 1,380,765.18 and 570,640.60

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Solution

The fourth proportional to 1,000,459, 1,380,765.18 and 570,640.60 is: 787,559.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,000,459 : 1,380,765.18 = 570,640.60 : x
  2. Step 2: Convert to fraction form
    1,000,459/1,380,765.18 = 570,640.60/x
  3. Step 3: Cross multiply
    1,000,459x = 1,380,765.18 × 570,640.60
  4. Step 4: Simplify right side
    1,000,459x = 787,920,670,774.31
  5. Step 5: Solve for x
    x = 787,920,670,774.31/1,000,459
  6. Step 6: Final answer
    x = 787,559.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.