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Finding the Fourth Proportional to 395,518.90, 545,665.42 and 292,400.70

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Solution

The fourth proportional to 395,518.90, 545,665.42 and 292,400.70 is: 403,401.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,518.90 : 545,665.42 = 292,400.70 : x
  2. Step 2: Convert to fraction form
    395,518.90/545,665.42 = 292,400.70/x
  3. Step 3: Cross multiply
    395,518.90x = 545,665.42 × 292,400.70
  4. Step 4: Simplify right side
    395,518.90x = 159,552,950,773.79
  5. Step 5: Solve for x
    x = 159,552,950,773.79/395,518.90
  6. Step 6: Final answer
    x = 403,401.58

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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.