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Finding the Fourth Proportional to 328,087.60, 492,070.65 and 91,381.30

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Solution

The fourth proportional to 328,087.60, 492,070.65 and 91,381.30 is: 137,055.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,087.60 : 492,070.65 = 91,381.30 : x
  2. Step 2: Convert to fraction form
    328,087.60/492,070.65 = 91,381.30/x
  3. Step 3: Cross multiply
    328,087.60x = 492,070.65 × 91,381.30
  4. Step 4: Simplify right side
    328,087.60x = 44,966,055,688.85
  5. Step 5: Solve for x
    x = 44,966,055,688.85/328,087.60
  6. Step 6: Final answer
    x = 137,055.03

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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.