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Finding the Fourth Proportional to 386,483.42, 579,648.84 and 130,290.63

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Solution

The fourth proportional to 386,483.42, 579,648.84 and 130,290.63 is: 195,410.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,483.42 : 579,648.84 = 130,290.63 : x
  2. Step 2: Convert to fraction form
    386,483.42/579,648.84 = 130,290.63/x
  3. Step 3: Cross multiply
    386,483.42x = 579,648.84 × 130,290.63
  4. Step 4: Simplify right side
    386,483.42x = 75,522,812,542.37
  5. Step 5: Solve for x
    x = 75,522,812,542.37/386,483.42
  6. Step 6: Final answer
    x = 195,410.23

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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.