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Finding the Fourth Proportional to 548,518.40, 756,940.80 and 310,054.40

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Solution

The fourth proportional to 548,518.40, 756,940.80 and 310,054.40 is: 427,866.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,518.40 : 756,940.80 = 310,054.40 : x
  2. Step 2: Convert to fraction form
    548,518.40/756,940.80 = 310,054.40/x
  3. Step 3: Cross multiply
    548,518.40x = 756,940.80 × 310,054.40
  4. Step 4: Simplify right side
    548,518.40x = 234,692,825,579.52
  5. Step 5: Solve for x
    x = 234,692,825,579.52/548,518.40
  6. Step 6: Final answer
    x = 427,866.82

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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.