Home / 605,218.93-834,921.72-390,428.20

Finding the Fourth Proportional to 605,218.93, 834,921.72 and 390,428.20

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Solution

The fourth proportional to 605,218.93, 834,921.72 and 390,428.20 is: 538,610.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,218.93 : 834,921.72 = 390,428.20 : x
  2. Step 2: Convert to fraction form
    605,218.93/834,921.72 = 390,428.20/x
  3. Step 3: Cross multiply
    605,218.93x = 834,921.72 × 390,428.20
  4. Step 4: Simplify right side
    605,218.93x = 325,976,984,280.50
  5. Step 5: Solve for x
    x = 325,976,984,280.50/605,218.93
  6. Step 6: Final answer
    x = 538,610.03

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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.