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Finding the Fourth Proportional to 472,371.12, 650,628.18 and 391,539.60

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Solution

The fourth proportional to 472,371.12, 650,628.18 and 391,539.60 is: 539,293.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,371.12 : 650,628.18 = 391,539.60 : x
  2. Step 2: Convert to fraction form
    472,371.12/650,628.18 = 391,539.60/x
  3. Step 3: Cross multiply
    472,371.12x = 650,628.18 × 391,539.60
  4. Step 4: Simplify right side
    472,371.12x = 254,746,697,345.93
  5. Step 5: Solve for x
    x = 254,746,697,345.93/472,371.12
  6. Step 6: Final answer
    x = 539,293.55

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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.