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Finding the Fourth Proportional to 716,782.88, 989,109.32 and 426,378.44

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Solution

The fourth proportional to 716,782.88, 989,109.32 and 426,378.44 is: 588,371.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,782.88 : 989,109.32 = 426,378.44 : x
  2. Step 2: Convert to fraction form
    716,782.88/989,109.32 = 426,378.44/x
  3. Step 3: Cross multiply
    716,782.88x = 989,109.32 × 426,378.44
  4. Step 4: Simplify right side
    716,782.88x = 421,734,888,851.06
  5. Step 5: Solve for x
    x = 421,734,888,851.06/716,782.88
  6. Step 6: Final answer
    x = 588,371.88

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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.