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Finding the Fourth Proportional to 716,088.66, 988,227.72 and 393,823.68

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Solution

The fourth proportional to 716,088.66, 988,227.72 and 393,823.68 is: 543,490.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,088.66 : 988,227.72 = 393,823.68 : x
  2. Step 2: Convert to fraction form
    716,088.66/988,227.72 = 393,823.68/x
  3. Step 3: Cross multiply
    716,088.66x = 988,227.72 × 393,823.68
  4. Step 4: Simplify right side
    716,088.66x = 389,187,477,368.41
  5. Step 5: Solve for x
    x = 389,187,477,368.41/716,088.66
  6. Step 6: Final answer
    x = 543,490.63

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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.