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Finding the Fourth Proportional to 398,030.55, 549,282.34 and 216,742.47

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Solution

The fourth proportional to 398,030.55, 549,282.34 and 216,742.47 is: 299,104.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,030.55 : 549,282.34 = 216,742.47 : x
  2. Step 2: Convert to fraction form
    398,030.55/549,282.34 = 216,742.47/x
  3. Step 3: Cross multiply
    398,030.55x = 549,282.34 × 216,742.47
  4. Step 4: Simplify right side
    398,030.55x = 119,052,812,616.93
  5. Step 5: Solve for x
    x = 119,052,812,616.93/398,030.55
  6. Step 6: Final answer
    x = 299,104.71

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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.