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Finding the Fourth Proportional to 385,803.25, 532,402.72 and 213,720.68

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Solution

The fourth proportional to 385,803.25, 532,402.72 and 213,720.68 is: 294,931.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,803.25 : 532,402.72 = 213,720.68 : x
  2. Step 2: Convert to fraction form
    385,803.25/532,402.72 = 213,720.68/x
  3. Step 3: Cross multiply
    385,803.25x = 532,402.72 × 213,720.68
  4. Step 4: Simplify right side
    385,803.25x = 113,785,470,356.37
  5. Step 5: Solve for x
    x = 113,785,470,356.37/385,803.25
  6. Step 6: Final answer
    x = 294,931.34

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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.