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Finding the Fourth Proportional to 286,754.10, 395,714.15 and 155,928.90

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Solution

The fourth proportional to 286,754.10, 395,714.15 and 155,928.90 is: 215,178.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,754.10 : 395,714.15 = 155,928.90 : x
  2. Step 2: Convert to fraction form
    286,754.10/395,714.15 = 155,928.90/x
  3. Step 3: Cross multiply
    286,754.10x = 395,714.15 × 155,928.90
  4. Step 4: Simplify right side
    286,754.10x = 61,703,271,344.29
  5. Step 5: Solve for x
    x = 61,703,271,344.29/286,754.10
  6. Step 6: Final answer
    x = 215,178.34

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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.