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Finding the Fourth Proportional to 895,220, 1,235,403.60 and 492,812

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Solution

The fourth proportional to 895,220, 1,235,403.60 and 492,812 is: 680,080.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    895,220 : 1,235,403.60 = 492,812 : x
  2. Step 2: Convert to fraction form
    895,220/1,235,403.60 = 492,812/x
  3. Step 3: Cross multiply
    895,220x = 1,235,403.60 × 492,812
  4. Step 4: Simplify right side
    895,220x = 608,821,718,923.20
  5. Step 5: Solve for x
    x = 608,821,718,923.20/895,220
  6. Step 6: Final answer
    x = 680,080.56

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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.