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Finding the Fourth Proportional to 364,556.40, 547,871.40 and 318,937.20

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Solution

The fourth proportional to 364,556.40, 547,871.40 and 318,937.20 is: 479,312.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    364,556.40 : 547,871.40 = 318,937.20 : x
  2. Step 2: Convert to fraction form
    364,556.40/547,871.40 = 318,937.20/x
  3. Step 3: Cross multiply
    364,556.40x = 547,871.40 × 318,937.20
  4. Step 4: Simplify right side
    364,556.40x = 174,736,570,276.08
  5. Step 5: Solve for x
    x = 174,736,570,276.08/364,556.40
  6. Step 6: Final answer
    x = 479,312.86

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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.