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Finding the Fourth Proportional to 560,665.41, 774,730.35 and 399,240.20

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Solution

The fourth proportional to 560,665.41, 774,730.35 and 399,240.20 is: 551,672.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    560,665.41 : 774,730.35 = 399,240.20 : x
  2. Step 2: Convert to fraction form
    560,665.41/774,730.35 = 399,240.20/x
  3. Step 3: Cross multiply
    560,665.41x = 774,730.35 × 399,240.20
  4. Step 4: Simplify right side
    560,665.41x = 309,303,497,883.87
  5. Step 5: Solve for x
    x = 309,303,497,883.87/560,665.41
  6. Step 6: Final answer
    x = 551,672.17

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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.