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Finding the Fourth Proportional to 643,506.54, 888,039.14 and 357,025.94

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Solution

The fourth proportional to 643,506.54, 888,039.14 and 357,025.94 is: 492,695.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,506.54 : 888,039.14 = 357,025.94 : x
  2. Step 2: Convert to fraction form
    643,506.54/888,039.14 = 357,025.94/x
  3. Step 3: Cross multiply
    643,506.54x = 888,039.14 × 357,025.94
  4. Step 4: Simplify right side
    643,506.54x = 317,053,005,820.11
  5. Step 5: Solve for x
    x = 317,053,005,820.11/643,506.54
  6. Step 6: Final answer
    x = 492,695.86

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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.