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Finding the Fourth Proportional to 572,369.61, 789,830.55 and 317,700.75

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Solution

The fourth proportional to 572,369.61, 789,830.55 and 317,700.75 is: 438,405.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,369.61 : 789,830.55 = 317,700.75 : x
  2. Step 2: Convert to fraction form
    572,369.61/789,830.55 = 317,700.75/x
  3. Step 3: Cross multiply
    572,369.61x = 789,830.55 × 317,700.75
  4. Step 4: Simplify right side
    572,369.61x = 250,929,758,107.91
  5. Step 5: Solve for x
    x = 250,929,758,107.91/572,369.61
  6. Step 6: Final answer
    x = 438,405.10

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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.