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Finding the Fourth Proportional to 346,728.54, 520,172.64 and 147,056.70

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Solution

The fourth proportional to 346,728.54, 520,172.64 and 147,056.70 is: 220,618.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,728.54 : 520,172.64 = 147,056.70 : x
  2. Step 2: Convert to fraction form
    346,728.54/520,172.64 = 147,056.70/x
  3. Step 3: Cross multiply
    346,728.54x = 520,172.64 × 147,056.70
  4. Step 4: Simplify right side
    346,728.54x = 76,494,871,868.69
  5. Step 5: Solve for x
    x = 76,494,871,868.69/346,728.54
  6. Step 6: Final answer
    x = 220,618.91

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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.