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Finding the Fourth Proportional to 718,316.81, 991,284.48 and 396,038.41

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Solution

The fourth proportional to 718,316.81, 991,284.48 and 396,038.41 is: 546,537.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,316.81 : 991,284.48 = 396,038.41 : x
  2. Step 2: Convert to fraction form
    718,316.81/991,284.48 = 396,038.41/x
  3. Step 3: Cross multiply
    718,316.81x = 991,284.48 × 396,038.41
  4. Step 4: Simplify right side
    718,316.81x = 392,586,732,414.64
  5. Step 5: Solve for x
    x = 392,586,732,414.64/718,316.81
  6. Step 6: Final answer
    x = 546,537.03

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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.