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Finding the Fourth Proportional to 380,779.20, 570,477.60 and 310,276.80

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Solution

The fourth proportional to 380,779.20, 570,477.60 and 310,276.80 is: 464,851.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,779.20 : 570,477.60 = 310,276.80 : x
  2. Step 2: Convert to fraction form
    380,779.20/570,477.60 = 310,276.80/x
  3. Step 3: Cross multiply
    380,779.20x = 570,477.60 × 310,276.80
  4. Step 4: Simplify right side
    380,779.20x = 177,005,964,199.68
  5. Step 5: Solve for x
    x = 177,005,964,199.68/380,779.20
  6. Step 6: Final answer
    x = 464,851.98

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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.