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Finding the Fourth Proportional to 389,392.70, 584,349.65 and 136,674.36

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Solution

The fourth proportional to 389,392.70, 584,349.65 and 136,674.36 is: 205,103.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,392.70 : 584,349.65 = 136,674.36 : x
  2. Step 2: Convert to fraction form
    389,392.70/584,349.65 = 136,674.36/x
  3. Step 3: Cross multiply
    389,392.70x = 584,349.65 × 136,674.36
  4. Step 4: Simplify right side
    389,392.70x = 79,865,613,746.60
  5. Step 5: Solve for x
    x = 79,865,613,746.60/389,392.70
  6. Step 6: Final answer
    x = 205,103.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.