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Finding the Fourth Proportional to 388,200.45, 535,728.63 and 211,402.67

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Solution

The fourth proportional to 388,200.45, 535,728.63 and 211,402.67 is: 291,742.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,200.45 : 535,728.63 = 211,402.67 : x
  2. Step 2: Convert to fraction form
    388,200.45/535,728.63 = 211,402.67/x
  3. Step 3: Cross multiply
    388,200.45x = 535,728.63 × 211,402.67
  4. Step 4: Simplify right side
    388,200.45x = 113,254,460,098.80
  5. Step 5: Solve for x
    x = 113,254,460,098.80/388,200.45
  6. Step 6: Final answer
    x = 291,742.22

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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.