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Finding the Fourth Proportional to 389,011.05, 536,814.51 and 216,946.68

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Solution

The fourth proportional to 389,011.05, 536,814.51 and 216,946.68 is: 299,374.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,011.05 : 536,814.51 = 216,946.68 : x
  2. Step 2: Convert to fraction form
    389,011.05/536,814.51 = 216,946.68/x
  3. Step 3: Cross multiply
    389,011.05x = 536,814.51 × 216,946.68
  4. Step 4: Simplify right side
    389,011.05x = 116,460,125,720.33
  5. Step 5: Solve for x
    x = 116,460,125,720.33/389,011.05
  6. Step 6: Final answer
    x = 299,374.85

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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.