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Finding the Fourth Proportional to 889,061, 1,333,708.68 and 289,812.20

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Solution

The fourth proportional to 889,061, 1,333,708.68 and 289,812.20 is: 434,756.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    889,061 : 1,333,708.68 = 289,812.20 : x
  2. Step 2: Convert to fraction form
    889,061/1,333,708.68 = 289,812.20/x
  3. Step 3: Cross multiply
    889,061x = 1,333,708.68 × 289,812.20
  4. Step 4: Simplify right side
    889,061x = 386,525,046,709.90
  5. Step 5: Solve for x
    x = 386,525,046,709.90/889,061
  6. Step 6: Final answer
    x = 434,756.50

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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.