Home / 380,815.20-570,531.60-310,312.80

Finding the Fourth Proportional to 380,815.20, 570,531.60 and 310,312.80

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Solution

The fourth proportional to 380,815.20, 570,531.60 and 310,312.80 is: 464,905.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,815.20 : 570,531.60 = 310,312.80 : x
  2. Step 2: Convert to fraction form
    380,815.20/570,531.60 = 310,312.80/x
  3. Step 3: Cross multiply
    380,815.20x = 570,531.60 × 310,312.80
  4. Step 4: Simplify right side
    380,815.20x = 177,043,258,284.48
  5. Step 5: Solve for x
    x = 177,043,258,284.48/380,815.20
  6. Step 6: Final answer
    x = 464,905.97

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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.