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Finding the Fourth Proportional to 278,980.77, 385,035.49 and 170,148.25

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Solution

The fourth proportional to 278,980.77, 385,035.49 and 170,148.25 is: 234,830.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,980.77 : 385,035.49 = 170,148.25 : x
  2. Step 2: Convert to fraction form
    278,980.77/385,035.49 = 170,148.25/x
  3. Step 3: Cross multiply
    278,980.77x = 385,035.49 × 170,148.25
  4. Step 4: Simplify right side
    278,980.77x = 65,513,112,886.22
  5. Step 5: Solve for x
    x = 65,513,112,886.22/278,980.77
  6. Step 6: Final answer
    x = 234,830.21

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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.