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Finding the Fourth Proportional to 643,509.12, 888,042.69 and 357,028.52

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Solution

The fourth proportional to 643,509.12, 888,042.69 and 357,028.52 is: 492,699.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,509.12 : 888,042.69 = 357,028.52 : x
  2. Step 2: Convert to fraction form
    643,509.12/888,042.69 = 357,028.52/x
  3. Step 3: Cross multiply
    643,509.12x = 888,042.69 × 357,028.52
  4. Step 4: Simplify right side
    643,509.12x = 317,056,562,867.31
  5. Step 5: Solve for x
    x = 317,056,562,867.31/643,509.12
  6. Step 6: Final answer
    x = 492,699.41

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1.5x scale

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.