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Finding the Fourth Proportional to 278,878.51, 384,854.79 and 151,554.10

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Solution

The fourth proportional to 278,878.51, 384,854.79 and 151,554.10 is: 209,145.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,878.51 : 384,854.79 = 151,554.10 : x
  2. Step 2: Convert to fraction form
    278,878.51/384,854.79 = 151,554.10/x
  3. Step 3: Cross multiply
    278,878.51x = 384,854.79 × 151,554.10
  4. Step 4: Simplify right side
    278,878.51x = 58,326,321,329.14
  5. Step 5: Solve for x
    x = 58,326,321,329.14/278,878.51
  6. Step 6: Final answer
    x = 209,145.99

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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.