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Finding the Fourth Proportional to 571,641.30, 788,913.45 and 317,074.50

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Solution

The fourth proportional to 571,641.30, 788,913.45 and 317,074.50 is: 437,589.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,641.30 : 788,913.45 = 317,074.50 : x
  2. Step 2: Convert to fraction form
    571,641.30/788,913.45 = 317,074.50/x
  3. Step 3: Cross multiply
    571,641.30x = 788,913.45 × 317,074.50
  4. Step 4: Simplify right side
    571,641.30x = 250,144,337,702.03
  5. Step 5: Solve for x
    x = 250,144,337,702.03/571,641.30
  6. Step 6: Final answer
    x = 437,589.69

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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.