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Finding the Fourth Proportional to 716,518.40, 988,810.72 and 394,229.44

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Solution

The fourth proportional to 716,518.40, 988,810.72 and 394,229.44 is: 544,045.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,518.40 : 988,810.72 = 394,229.44 : x
  2. Step 2: Convert to fraction form
    716,518.40/988,810.72 = 394,229.44/x
  3. Step 3: Cross multiply
    716,518.40x = 988,810.72 × 394,229.44
  4. Step 4: Simplify right side
    716,518.40x = 389,818,296,411.60
  5. Step 5: Solve for x
    x = 389,818,296,411.60/716,518.40
  6. Step 6: Final answer
    x = 544,045.06

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1.5x scale

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.