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Finding the Fourth Proportional to 545,688.40, 818,622.20 and 171,621.20

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Solution

The fourth proportional to 545,688.40, 818,622.20 and 171,621.20 is: 257,459.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,688.40 : 818,622.20 = 171,621.20 : x
  2. Step 2: Convert to fraction form
    545,688.40/818,622.20 = 171,621.20/x
  3. Step 3: Cross multiply
    545,688.40x = 818,622.20 × 171,621.20
  4. Step 4: Simplify right side
    545,688.40x = 140,492,924,310.64
  5. Step 5: Solve for x
    x = 140,492,924,310.64/545,688.40
  6. Step 6: Final answer
    x = 257,459.98

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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.