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Finding the Fourth Proportional to 289,968.80, 434,434.80 and 245,386.40

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Solution

The fourth proportional to 289,968.80, 434,434.80 and 245,386.40 is: 367,640.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,968.80 : 434,434.80 = 245,386.40 : x
  2. Step 2: Convert to fraction form
    289,968.80/434,434.80 = 245,386.40/x
  3. Step 3: Cross multiply
    289,968.80x = 434,434.80 × 245,386.40
  4. Step 4: Simplify right side
    289,968.80x = 106,604,391,606.72
  5. Step 5: Solve for x
    x = 106,604,391,606.72/289,968.80
  6. Step 6: Final answer
    x = 367,640.90

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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.