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Finding the Fourth Proportional to 395,847.36, 546,328.80 and 311,598.72

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Solution

The fourth proportional to 395,847.36, 546,328.80 and 311,598.72 is: 430,053.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,847.36 : 546,328.80 = 311,598.72 : x
  2. Step 2: Convert to fraction form
    395,847.36/546,328.80 = 311,598.72/x
  3. Step 3: Cross multiply
    395,847.36x = 546,328.80 × 311,598.72
  4. Step 4: Simplify right side
    395,847.36x = 170,235,354,779.14
  5. Step 5: Solve for x
    x = 170,235,354,779.14/395,847.36
  6. Step 6: Final answer
    x = 430,053.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.