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Finding the Fourth Proportional to 386,648.70, 579,973.05 and 346,098.30

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Solution

The fourth proportional to 386,648.70, 579,973.05 and 346,098.30 is: 519,147.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,648.70 : 579,973.05 = 346,098.30 : x
  2. Step 2: Convert to fraction form
    386,648.70/579,973.05 = 346,098.30/x
  3. Step 3: Cross multiply
    386,648.70x = 579,973.05 × 346,098.30
  4. Step 4: Simplify right side
    386,648.70x = 200,727,686,650.82
  5. Step 5: Solve for x
    x = 200,727,686,650.82/386,648.70
  6. Step 6: Final answer
    x = 519,147.45

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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.