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Finding the Fourth Proportional to 572,502.79, 790,078.53 and 317,854

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Solution

The fourth proportional to 572,502.79, 790,078.53 and 317,854 is: 438,652.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,502.79 : 790,078.53 = 317,854 : x
  2. Step 2: Convert to fraction form
    572,502.79/790,078.53 = 317,854/x
  3. Step 3: Cross multiply
    572,502.79x = 790,078.53 × 317,854
  4. Step 4: Simplify right side
    572,502.79x = 251,129,621,074.62
  5. Step 5: Solve for x
    x = 251,129,621,074.62/572,502.79
  6. Step 6: Final answer
    x = 438,652.22

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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.