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Finding the Fourth Proportional to 285,444.50, 393,913.42 and 158,128.34

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Solution

The fourth proportional to 285,444.50, 393,913.42 and 158,128.34 is: 218,217.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,444.50 : 393,913.42 = 158,128.34 : x
  2. Step 2: Convert to fraction form
    285,444.50/393,913.42 = 158,128.34/x
  3. Step 3: Cross multiply
    285,444.50x = 393,913.42 × 158,128.34
  4. Step 4: Simplify right side
    285,444.50x = 62,288,875,208.32
  5. Step 5: Solve for x
    x = 62,288,875,208.32/285,444.50
  6. Step 6: Final answer
    x = 218,217.11

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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.