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Finding the Fourth Proportional to 217,915, 300,739.10 and 133,048.47

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Solution

The fourth proportional to 217,915, 300,739.10 and 133,048.47 is: 183,616.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,915 : 300,739.10 = 133,048.47 : x
  2. Step 2: Convert to fraction form
    217,915/300,739.10 = 133,048.47/x
  3. Step 3: Cross multiply
    217,915x = 300,739.10 × 133,048.47
  4. Step 4: Simplify right side
    217,915x = 40,012,877,124.18
  5. Step 5: Solve for x
    x = 40,012,877,124.18/217,915
  6. Step 6: Final answer
    x = 183,616.90

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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.