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Finding the Fourth Proportional to 572,745.58, 790,366.65 and 318,112.90

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Solution

The fourth proportional to 572,745.58, 790,366.65 and 318,112.90 is: 438,983.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,745.58 : 790,366.65 = 318,112.90 : x
  2. Step 2: Convert to fraction form
    572,745.58/790,366.65 = 318,112.90/x
  3. Step 3: Cross multiply
    572,745.58x = 790,366.65 × 318,112.90
  4. Step 4: Simplify right side
    572,745.58x = 251,425,827,094.79
  5. Step 5: Solve for x
    x = 251,425,827,094.79/572,745.58
  6. Step 6: Final answer
    x = 438,983.44

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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.