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Finding the Fourth Proportional to 399,430.30, 551,212.50 and 238,292.14

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Solution

The fourth proportional to 399,430.30, 551,212.50 and 238,292.14 is: 328,842.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,430.30 : 551,212.50 = 238,292.14 : x
  2. Step 2: Convert to fraction form
    399,430.30/551,212.50 = 238,292.14/x
  3. Step 3: Cross multiply
    399,430.30x = 551,212.50 × 238,292.14
  4. Step 4: Simplify right side
    399,430.30x = 131,349,606,219.75
  5. Step 5: Solve for x
    x = 131,349,606,219.75/399,430.30
  6. Step 6: Final answer
    x = 328,842.37

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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.