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Finding the Fourth Proportional to 287,878.05, 397,253.80 and 158,818.19

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Solution

The fourth proportional to 287,878.05, 397,253.80 and 158,818.19 is: 219,159.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,878.05 : 397,253.80 = 158,818.19 : x
  2. Step 2: Convert to fraction form
    287,878.05/397,253.80 = 158,818.19/x
  3. Step 3: Cross multiply
    287,878.05x = 397,253.80 × 158,818.19
  4. Step 4: Simplify right side
    287,878.05x = 63,091,127,698.88
  5. Step 5: Solve for x
    x = 63,091,127,698.88/287,878.05
  6. Step 6: Final answer
    x = 219,159.22

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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.