Home / 579,619.40-869,429.10-402,326.60

Finding the Fourth Proportional to 579,619.40, 869,429.10 and 402,326.60

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Solution

The fourth proportional to 579,619.40, 869,429.10 and 402,326.60 is: 603,489.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,619.40 : 869,429.10 = 402,326.60 : x
  2. Step 2: Convert to fraction form
    579,619.40/869,429.10 = 402,326.60/x
  3. Step 3: Cross multiply
    579,619.40x = 869,429.10 × 402,326.60
  4. Step 4: Simplify right side
    579,619.40x = 349,794,453,744.06
  5. Step 5: Solve for x
    x = 349,794,453,744.06/579,619.40
  6. Step 6: Final answer
    x = 603,489.90

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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.