Home / 538,104.04-742,583.54-311,880.76

Finding the Fourth Proportional to 538,104.04, 742,583.54 and 311,880.76

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Solution

The fourth proportional to 538,104.04, 742,583.54 and 311,880.76 is: 430,395.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,104.04 : 742,583.54 = 311,880.76 : x
  2. Step 2: Convert to fraction form
    538,104.04/742,583.54 = 311,880.76/x
  3. Step 3: Cross multiply
    538,104.04x = 742,583.54 × 311,880.76
  4. Step 4: Simplify right side
    538,104.04x = 231,597,518,818.69
  5. Step 5: Solve for x
    x = 231,597,518,818.69/538,104.04
  6. Step 6: Final answer
    x = 430,395.43

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Double scale
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Similar ratio
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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.