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Finding the Fourth Proportional to 326,830.68, 490,071.06 and 139,740.12

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Solution

The fourth proportional to 326,830.68, 490,071.06 and 139,740.12 is: 209,535.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,830.68 : 490,071.06 = 139,740.12 : x
  2. Step 2: Convert to fraction form
    326,830.68/490,071.06 = 139,740.12/x
  3. Step 3: Cross multiply
    326,830.68x = 490,071.06 × 139,740.12
  4. Step 4: Simplify right side
    326,830.68x = 68,482,588,732.93
  5. Step 5: Solve for x
    x = 68,482,588,732.93/326,830.68
  6. Step 6: Final answer
    x = 209,535.37

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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.