Home / 911,136.89-1,365,853.42-405,423.20

Finding the Fourth Proportional to 911,136.89, 1,365,853.42 and 405,423.20

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Solution

The fourth proportional to 911,136.89, 1,365,853.42 and 405,423.20 is: 607,755.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,136.89 : 1,365,853.42 = 405,423.20 : x
  2. Step 2: Convert to fraction form
    911,136.89/1,365,853.42 = 405,423.20/x
  3. Step 3: Cross multiply
    911,136.89x = 1,365,853.42 × 405,423.20
  4. Step 4: Simplify right side
    911,136.89x = 553,748,666,668.42
  5. Step 5: Solve for x
    x = 553,748,666,668.42/911,136.89
  6. Step 6: Final answer
    x = 607,755.73

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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.