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Finding the Fourth Proportional to 278,903.34, 418,382.69 and 89,316.09

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Solution

The fourth proportional to 278,903.34, 418,382.69 and 89,316.09 is: 133,983.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,903.34 : 418,382.69 = 89,316.09 : x
  2. Step 2: Convert to fraction form
    278,903.34/418,382.69 = 89,316.09/x
  3. Step 3: Cross multiply
    278,903.34x = 418,382.69 × 89,316.09
  4. Step 4: Simplify right side
    278,903.34x = 37,368,305,547.90
  5. Step 5: Solve for x
    x = 37,368,305,547.90/278,903.34
  6. Step 6: Final answer
    x = 133,983.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.