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Finding the Fourth Proportional to 346,662.40, 520,090.80 and 147,078.40

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Solution

The fourth proportional to 346,662.40, 520,090.80 and 147,078.40 is: 220,658.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,662.40 : 520,090.80 = 147,078.40 : x
  2. Step 2: Convert to fraction form
    346,662.40/520,090.80 = 147,078.40/x
  3. Step 3: Cross multiply
    346,662.40x = 520,090.80 × 147,078.40
  4. Step 4: Simplify right side
    346,662.40x = 76,494,122,718.72
  5. Step 5: Solve for x
    x = 76,494,122,718.72/346,662.40
  6. Step 6: Final answer
    x = 220,658.84

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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.