Home / 439,789.80-658,907.10-390,023.40

Finding the Fourth Proportional to 439,789.80, 658,907.10 and 390,023.40

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Solution

The fourth proportional to 439,789.80, 658,907.10 and 390,023.40 is: 584,345.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,789.80 : 658,907.10 = 390,023.40 : x
  2. Step 2: Convert to fraction form
    439,789.80/658,907.10 = 390,023.40/x
  3. Step 3: Cross multiply
    439,789.80x = 658,907.10 × 390,023.40
  4. Step 4: Simplify right side
    439,789.80x = 256,989,187,426.14
  5. Step 5: Solve for x
    x = 256,989,187,426.14/439,789.80
  6. Step 6: Final answer
    x = 584,345.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.