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Finding the Fourth Proportional to 328,085.10, 492,066.90 and 91,378.80

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Solution

The fourth proportional to 328,085.10, 492,066.90 and 91,378.80 is: 137,051.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,085.10 : 492,066.90 = 91,378.80 : x
  2. Step 2: Convert to fraction form
    328,085.10/492,066.90 = 91,378.80/x
  3. Step 3: Cross multiply
    328,085.10x = 492,066.90 × 91,378.80
  4. Step 4: Simplify right side
    328,085.10x = 44,964,482,841.72
  5. Step 5: Solve for x
    x = 44,964,482,841.72/328,085.10
  6. Step 6: Final answer
    x = 137,051.28

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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.