Home / 390,890.70-539,442.36-229,743.45

Finding the Fourth Proportional to 390,890.70, 539,442.36 and 229,743.45

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Solution

The fourth proportional to 390,890.70, 539,442.36 and 229,743.45 is: 317,053.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,890.70 : 539,442.36 = 229,743.45 : x
  2. Step 2: Convert to fraction form
    390,890.70/539,442.36 = 229,743.45/x
  3. Step 3: Cross multiply
    390,890.70x = 539,442.36 × 229,743.45
  4. Step 4: Simplify right side
    390,890.70x = 123,933,348,862.54
  5. Step 5: Solve for x
    x = 123,933,348,862.54/390,890.70
  6. Step 6: Final answer
    x = 317,053.72

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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.