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Finding the Fourth Proportional to 384,777.36, 530,991.45 and 215,011.49

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Solution

The fourth proportional to 384,777.36, 530,991.45 and 215,011.49 is: 296,715.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,777.36 : 530,991.45 = 215,011.49 : x
  2. Step 2: Convert to fraction form
    384,777.36/530,991.45 = 215,011.49/x
  3. Step 3: Cross multiply
    384,777.36x = 530,991.45 × 215,011.49
  4. Step 4: Simplify right side
    384,777.36x = 114,169,260,186.80
  5. Step 5: Solve for x
    x = 114,169,260,186.80/384,777.36
  6. Step 6: Final answer
    x = 296,715.12

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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.