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Finding the Fourth Proportional to 217,421.40, 325,613.70 and 217,421.40

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Solution

The fourth proportional to 217,421.40, 325,613.70 and 217,421.40 is: 325,613.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,421.40 : 325,613.70 = 217,421.40 : x
  2. Step 2: Convert to fraction form
    217,421.40/325,613.70 = 217,421.40/x
  3. Step 3: Cross multiply
    217,421.40x = 325,613.70 × 217,421.40
  4. Step 4: Simplify right side
    217,421.40x = 70,795,386,513.18
  5. Step 5: Solve for x
    x = 70,795,386,513.18/217,421.40
  6. Step 6: Final answer
    x = 325,613.70

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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.