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Finding the Fourth Proportional to 312,357.04, 431,050.74 and 169,116.64

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Solution

The fourth proportional to 312,357.04, 431,050.74 and 169,116.64 is: 233,379.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,357.04 : 431,050.74 = 169,116.64 : x
  2. Step 2: Convert to fraction form
    312,357.04/431,050.74 = 169,116.64/x
  3. Step 3: Cross multiply
    312,357.04x = 431,050.74 × 169,116.64
  4. Step 4: Simplify right side
    312,357.04x = 72,897,852,818.31
  5. Step 5: Solve for x
    x = 72,897,852,818.31/312,357.04
  6. Step 6: Final answer
    x = 233,379.89

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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.