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Finding the Fourth Proportional to 716,398.64, 988,598.94 and 394,088.30

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Solution

The fourth proportional to 716,398.64, 988,598.94 and 394,088.30 is: 543,824.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,398.64 : 988,598.94 = 394,088.30 : x
  2. Step 2: Convert to fraction form
    716,398.64/988,598.94 = 394,088.30/x
  3. Step 3: Cross multiply
    716,398.64x = 988,598.94 × 394,088.30
  4. Step 4: Simplify right side
    716,398.64x = 389,595,270,703.41
  5. Step 5: Solve for x
    x = 389,595,270,703.41/716,398.64
  6. Step 6: Final answer
    x = 543,824.70

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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.