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Finding the Fourth Proportional to 563,280, 777,326.40 and 308,640.30

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Solution

The fourth proportional to 563,280, 777,326.40 and 308,640.30 is: 425,923.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    563,280 : 777,326.40 = 308,640.30 : x
  2. Step 2: Convert to fraction form
    563,280/777,326.40 = 308,640.30/x
  3. Step 3: Cross multiply
    563,280x = 777,326.40 × 308,640.30
  4. Step 4: Simplify right side
    563,280x = 239,914,253,293.92
  5. Step 5: Solve for x
    x = 239,914,253,293.92/563,280
  6. Step 6: Final answer
    x = 425,923.61

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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.