Home / 579,823.60-869,735.40-280,447.60

Finding the Fourth Proportional to 579,823.60, 869,735.40 and 280,447.60

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Solution

The fourth proportional to 579,823.60, 869,735.40 and 280,447.60 is: 420,671.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,823.60 : 869,735.40 = 280,447.60 : x
  2. Step 2: Convert to fraction form
    579,823.60/869,735.40 = 280,447.60/x
  3. Step 3: Cross multiply
    579,823.60x = 869,735.40 × 280,447.60
  4. Step 4: Simplify right side
    579,823.60x = 243,915,205,565.04
  5. Step 5: Solve for x
    x = 243,915,205,565.04/579,823.60
  6. Step 6: Final answer
    x = 420,671.40

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Double scale
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Similar ratio
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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.