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Finding the Fourth Proportional to 287,740.72, 397,073.06 and 158,684.64

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Solution

The fourth proportional to 287,740.72, 397,073.06 and 158,684.64 is: 218,979.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,740.72 : 397,073.06 = 158,684.64 : x
  2. Step 2: Convert to fraction form
    287,740.72/397,073.06 = 158,684.64/x
  3. Step 3: Cross multiply
    287,740.72x = 397,073.06 × 158,684.64
  4. Step 4: Simplify right side
    287,740.72x = 63,009,395,579.80
  5. Step 5: Solve for x
    x = 63,009,395,579.80/287,740.72
  6. Step 6: Final answer
    x = 218,979.77

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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.