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Finding the Fourth Proportional to 287,740.01, 397,072.53 and 158,678.42

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Solution

The fourth proportional to 287,740.01, 397,072.53 and 158,678.42 is: 218,971.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,740.01 : 397,072.53 = 158,678.42 : x
  2. Step 2: Convert to fraction form
    287,740.01/397,072.53 = 158,678.42/x
  3. Step 3: Cross multiply
    287,740.01x = 397,072.53 × 158,678.42
  4. Step 4: Simplify right side
    287,740.01x = 63,006,841,289.11
  5. Step 5: Solve for x
    x = 63,006,841,289.11/287,740.01
  6. Step 6: Final answer
    x = 218,971.43

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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.