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Finding the Fourth Proportional to 431,323.80, 646,832.10 and 194,779.80

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Solution

The fourth proportional to 431,323.80, 646,832.10 and 194,779.80 is: 292,100.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,323.80 : 646,832.10 = 194,779.80 : x
  2. Step 2: Convert to fraction form
    431,323.80/646,832.10 = 194,779.80/x
  3. Step 3: Cross multiply
    431,323.80x = 646,832.10 × 194,779.80
  4. Step 4: Simplify right side
    431,323.80x = 125,989,827,071.58
  5. Step 5: Solve for x
    x = 125,989,827,071.58/431,323.80
  6. Step 6: Final answer
    x = 292,100.34

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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.