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Finding the Fourth Proportional to 716,890.47, 989,301 and 394,593.63

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Solution

The fourth proportional to 716,890.47, 989,301 and 394,593.63 is: 544,534.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,890.47 : 989,301 = 394,593.63 : x
  2. Step 2: Convert to fraction form
    716,890.47/989,301 = 394,593.63/x
  3. Step 3: Cross multiply
    716,890.47x = 989,301 × 394,593.63
  4. Step 4: Simplify right side
    716,890.47x = 390,371,872,752.63
  5. Step 5: Solve for x
    x = 390,371,872,752.63/716,890.47
  6. Step 6: Final answer
    x = 544,534.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.