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Finding the Fourth Proportional to 716,959.84, 989,440.10 and 394,666.51

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Solution

The fourth proportional to 716,959.84, 989,440.10 and 394,666.51 is: 544,659.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,959.84 : 989,440.10 = 394,666.51 : x
  2. Step 2: Convert to fraction form
    716,959.84/989,440.10 = 394,666.51/x
  3. Step 3: Cross multiply
    716,959.84x = 989,440.10 × 394,666.51
  4. Step 4: Simplify right side
    716,959.84x = 390,498,868,647.45
  5. Step 5: Solve for x
    x = 390,498,868,647.45/716,959.84
  6. Step 6: Final answer
    x = 544,659.34

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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.