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Finding the Fourth Proportional to 545,870.60, 818,921.10 and 171,931.40

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Solution

The fourth proportional to 545,870.60, 818,921.10 and 171,931.40 is: 257,933.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,870.60 : 818,921.10 = 171,931.40 : x
  2. Step 2: Convert to fraction form
    545,870.60/818,921.10 = 171,931.40/x
  3. Step 3: Cross multiply
    545,870.60x = 818,921.10 × 171,931.40
  4. Step 4: Simplify right side
    545,870.60x = 140,798,251,212.54
  5. Step 5: Solve for x
    x = 140,798,251,212.54/545,870.60
  6. Step 6: Final answer
    x = 257,933.38

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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.