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Finding the Fourth Proportional to 572,689.21, 790,289.45 and 318,056.80

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Solution

The fourth proportional to 572,689.21, 790,289.45 and 318,056.80 is: 438,906.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,689.21 : 790,289.45 = 318,056.80 : x
  2. Step 2: Convert to fraction form
    572,689.21/790,289.45 = 318,056.80/x
  3. Step 3: Cross multiply
    572,689.21x = 790,289.45 × 318,056.80
  4. Step 4: Simplify right side
    572,689.21x = 251,356,934,438.33
  5. Step 5: Solve for x
    x = 251,356,934,438.33/572,689.21
  6. Step 6: Final answer
    x = 438,906.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.