Home / 442,904.40-664,356.60-285,440.40

Finding the Fourth Proportional to 442,904.40, 664,356.60 and 285,440.40

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Solution

The fourth proportional to 442,904.40, 664,356.60 and 285,440.40 is: 428,160.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,904.40 : 664,356.60 = 285,440.40 : x
  2. Step 2: Convert to fraction form
    442,904.40/664,356.60 = 285,440.40/x
  3. Step 3: Cross multiply
    442,904.40x = 664,356.60 × 285,440.40
  4. Step 4: Simplify right side
    442,904.40x = 189,634,213,646.64
  5. Step 5: Solve for x
    x = 189,634,213,646.64/442,904.40
  6. Step 6: Final answer
    x = 428,160.60

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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.