Home / 390,748.56-538,977.96-247,359.12

Finding the Fourth Proportional to 390,748.56, 538,977.96 and 247,359.12

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Solution

The fourth proportional to 390,748.56, 538,977.96 and 247,359.12 is: 341,194.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,748.56 : 538,977.96 = 247,359.12 : x
  2. Step 2: Convert to fraction form
    390,748.56/538,977.96 = 247,359.12/x
  3. Step 3: Cross multiply
    390,748.56x = 538,977.96 × 247,359.12
  4. Step 4: Simplify right side
    390,748.56x = 133,321,113,885.00
  5. Step 5: Solve for x
    x = 133,321,113,885.00/390,748.56
  6. Step 6: Final answer
    x = 341,194.13

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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.