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Finding the Fourth Proportional to 345,885.48, 515,389.62 and 308,155.63

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Solution

The fourth proportional to 345,885.48, 515,389.62 and 308,155.63 is: 459,169.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,885.48 : 515,389.62 = 308,155.63 : x
  2. Step 2: Convert to fraction form
    345,885.48/515,389.62 = 308,155.63/x
  3. Step 3: Cross multiply
    345,885.48x = 515,389.62 × 308,155.63
  4. Step 4: Simplify right side
    345,885.48x = 158,820,213,046.56
  5. Step 5: Solve for x
    x = 158,820,213,046.56/345,885.48
  6. Step 6: Final answer
    x = 459,169.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.