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Finding the Fourth Proportional to 647,390.57, 893,378.52 and 357,014.39

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Solution

The fourth proportional to 647,390.57, 893,378.52 and 357,014.39 is: 492,668.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,390.57 : 893,378.52 = 357,014.39 : x
  2. Step 2: Convert to fraction form
    647,390.57/893,378.52 = 357,014.39/x
  3. Step 3: Cross multiply
    647,390.57x = 893,378.52 × 357,014.39
  4. Step 4: Simplify right side
    647,390.57x = 318,948,989,590.35
  5. Step 5: Solve for x
    x = 318,948,989,590.35/647,390.57
  6. Step 6: Final answer
    x = 492,668.57

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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.