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Finding the Fourth Proportional to 289,969.30, 434,435.55 and 245,386.90

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Solution

The fourth proportional to 289,969.30, 434,435.55 and 245,386.90 is: 367,641.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,969.30 : 434,435.55 = 245,386.90 : x
  2. Step 2: Convert to fraction form
    289,969.30/434,435.55 = 245,386.90/x
  3. Step 3: Cross multiply
    289,969.30x = 434,435.55 × 245,386.90
  4. Step 4: Simplify right side
    289,969.30x = 106,604,792,864.30
  5. Step 5: Solve for x
    x = 106,604,792,864.30/289,969.30
  6. Step 6: Final answer
    x = 367,641.65

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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.