Home / 858,866.40-1,288,522.32-326,396.64

Finding the Fourth Proportional to 858,866.40, 1,288,522.32 and 326,396.64

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Solution

The fourth proportional to 858,866.40, 1,288,522.32 and 326,396.64 is: 489,679.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,866.40 : 1,288,522.32 = 326,396.64 : x
  2. Step 2: Convert to fraction form
    858,866.40/1,288,522.32 = 326,396.64/x
  3. Step 3: Cross multiply
    858,866.40x = 1,288,522.32 × 326,396.64
  4. Step 4: Simplify right side
    858,866.40x = 420,569,355,813.01
  5. Step 5: Solve for x
    x = 420,569,355,813.01/858,866.40
  6. Step 6: Final answer
    x = 489,679.60

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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.