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Finding the Fourth Proportional to 389,424.80, 581,320.24 and 342,185.60

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Solution

The fourth proportional to 389,424.80, 581,320.24 and 342,185.60 is: 510,803.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,424.80 : 581,320.24 = 342,185.60 : x
  2. Step 2: Convert to fraction form
    389,424.80/581,320.24 = 342,185.60/x
  3. Step 3: Cross multiply
    389,424.80x = 581,320.24 × 342,185.60
  4. Step 4: Simplify right side
    389,424.80x = 198,919,415,116.54
  5. Step 5: Solve for x
    x = 198,919,415,116.54/389,424.80
  6. Step 6: Final answer
    x = 510,803.15

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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.