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Finding the Fourth Proportional to 572,685.22, 790,329.45 and 318,038.50

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Solution

The fourth proportional to 572,685.22, 790,329.45 and 318,038.50 is: 438,906.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,685.22 : 790,329.45 = 318,038.50 : x
  2. Step 2: Convert to fraction form
    572,685.22/790,329.45 = 318,038.50/x
  3. Step 3: Cross multiply
    572,685.22x = 790,329.45 × 318,038.50
  4. Step 4: Simplify right side
    572,685.22x = 251,355,192,783.83
  5. Step 5: Solve for x
    x = 251,355,192,783.83/572,685.22
  6. Step 6: Final answer
    x = 438,906.37

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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.