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Finding the Fourth Proportional to 468,421.21, 646,421.66 and 253,560.61

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Solution

The fourth proportional to 468,421.21, 646,421.66 and 253,560.61 is: 349,913.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    468,421.21 : 646,421.66 = 253,560.61 : x
  2. Step 2: Convert to fraction form
    468,421.21/646,421.66 = 253,560.61/x
  3. Step 3: Cross multiply
    468,421.21x = 646,421.66 × 253,560.61
  4. Step 4: Simplify right side
    468,421.21x = 163,907,070,426.81
  5. Step 5: Solve for x
    x = 163,907,070,426.81/468,421.21
  6. Step 6: Final answer
    x = 349,913.85

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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.