Home / 439,788.80-658,905.60-390,022.40

Finding the Fourth Proportional to 439,788.80, 658,905.60 and 390,022.40

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Solution

The fourth proportional to 439,788.80, 658,905.60 and 390,022.40 is: 584,343.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,788.80 : 658,905.60 = 390,022.40 : x
  2. Step 2: Convert to fraction form
    439,788.80/658,905.60 = 390,022.40/x
  3. Step 3: Cross multiply
    439,788.80x = 658,905.60 × 390,022.40
  4. Step 4: Simplify right side
    439,788.80x = 256,987,943,485.44
  5. Step 5: Solve for x
    x = 256,987,943,485.44/439,788.80
  6. Step 6: Final answer
    x = 584,343.99

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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.