Home / 579,629.40-869,444.10-402,336.60

Finding the Fourth Proportional to 579,629.40, 869,444.10 and 402,336.60

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Solution

The fourth proportional to 579,629.40, 869,444.10 and 402,336.60 is: 603,504.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,629.40 : 869,444.10 = 402,336.60 : x
  2. Step 2: Convert to fraction form
    579,629.40/869,444.10 = 402,336.60/x
  3. Step 3: Cross multiply
    579,629.40x = 869,444.10 × 402,336.60
  4. Step 4: Simplify right side
    579,629.40x = 349,809,183,084.06
  5. Step 5: Solve for x
    x = 349,809,183,084.06/579,629.40
  6. Step 6: Final answer
    x = 603,504.90

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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.