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Finding the Fourth Proportional to 443,085.85, 665,430.68 and 387,973.45

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Solution

The fourth proportional to 443,085.85, 665,430.68 and 387,973.45 is: 582,662.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,085.85 : 665,430.68 = 387,973.45 : x
  2. Step 2: Convert to fraction form
    443,085.85/665,430.68 = 387,973.45/x
  3. Step 3: Cross multiply
    443,085.85x = 665,430.68 × 387,973.45
  4. Step 4: Simplify right side
    443,085.85x = 258,169,434,715.58
  5. Step 5: Solve for x
    x = 258,169,434,715.58/443,085.85
  6. Step 6: Final answer
    x = 582,662.33

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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.