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Finding the Fourth Proportional to 292,668.65, 439,044.81 and 90,281.85

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Solution

The fourth proportional to 292,668.65, 439,044.81 and 90,281.85 is: 135,435.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,668.65 : 439,044.81 = 90,281.85 : x
  2. Step 2: Convert to fraction form
    292,668.65/439,044.81 = 90,281.85/x
  3. Step 3: Cross multiply
    292,668.65x = 439,044.81 × 90,281.85
  4. Step 4: Simplify right side
    292,668.65x = 39,637,777,679.70
  5. Step 5: Solve for x
    x = 39,637,777,679.70/292,668.65
  6. Step 6: Final answer
    x = 135,435.68

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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.