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Finding the Fourth Proportional to 398,074.50, 549,342.81 and 219,226.50

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Solution

The fourth proportional to 398,074.50, 549,342.81 and 219,226.50 is: 302,532.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,074.50 : 549,342.81 = 219,226.50 : x
  2. Step 2: Convert to fraction form
    398,074.50/549,342.81 = 219,226.50/x
  3. Step 3: Cross multiply
    398,074.50x = 549,342.81 × 219,226.50
  4. Step 4: Simplify right side
    398,074.50x = 120,430,501,536.47
  5. Step 5: Solve for x
    x = 120,430,501,536.47/398,074.50
  6. Step 6: Final answer
    x = 302,532.57

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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.