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Finding the Fourth Proportional to 716,141, 988,299.42 and 393,875.48

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Solution

The fourth proportional to 716,141, 988,299.42 and 393,875.48 is: 543,561.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,141 : 988,299.42 = 393,875.48 : x
  2. Step 2: Convert to fraction form
    716,141/988,299.42 = 393,875.48/x
  3. Step 3: Cross multiply
    716,141x = 988,299.42 × 393,875.48
  4. Step 4: Simplify right side
    716,141x = 389,266,908,436.22
  5. Step 5: Solve for x
    x = 389,266,908,436.22/716,141
  6. Step 6: Final answer
    x = 543,561.82

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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.