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Finding the Fourth Proportional to 387,586.44, 534,875.40 and 217,820.52

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Solution

The fourth proportional to 387,586.44, 534,875.40 and 217,820.52 is: 300,595.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,586.44 : 534,875.40 = 217,820.52 : x
  2. Step 2: Convert to fraction form
    387,586.44/534,875.40 = 217,820.52/x
  3. Step 3: Cross multiply
    387,586.44x = 534,875.40 × 217,820.52
  4. Step 4: Simplify right side
    387,586.44x = 116,506,837,763.21
  5. Step 5: Solve for x
    x = 116,506,837,763.21/387,586.44
  6. Step 6: Final answer
    x = 300,595.75

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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.