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Finding the Fourth Proportional to 609,492.91, 910,532.80 and 394,509.39

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Solution

The fourth proportional to 609,492.91, 910,532.80 and 394,509.39 is: 589,364.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,492.91 : 910,532.80 = 394,509.39 : x
  2. Step 2: Convert to fraction form
    609,492.91/910,532.80 = 394,509.39/x
  3. Step 3: Cross multiply
    609,492.91x = 910,532.80 × 394,509.39
  4. Step 4: Simplify right side
    609,492.91x = 359,213,739,502.99
  5. Step 5: Solve for x
    x = 359,213,739,502.99/609,492.91
  6. Step 6: Final answer
    x = 589,364.92

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.