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Finding the Fourth Proportional to 538,410.11, 742,955.15 and 317,612.95

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Solution

The fourth proportional to 538,410.11, 742,955.15 and 317,612.95 is: 438,275.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,410.11 : 742,955.15 = 317,612.95 : x
  2. Step 2: Convert to fraction form
    538,410.11/742,955.15 = 317,612.95/x
  3. Step 3: Cross multiply
    538,410.11x = 742,955.15 × 317,612.95
  4. Step 4: Simplify right side
    538,410.11x = 235,972,175,845.84
  5. Step 5: Solve for x
    x = 235,972,175,845.84/538,410.11
  6. Step 6: Final answer
    x = 438,275.90

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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.