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Finding the Fourth Proportional to 643,838.08, 888,456 and 357,341.44

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Solution

The fourth proportional to 643,838.08, 888,456 and 357,341.44 is: 493,108.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,838.08 : 888,456 = 357,341.44 : x
  2. Step 2: Convert to fraction form
    643,838.08/888,456 = 357,341.44/x
  3. Step 3: Cross multiply
    643,838.08x = 888,456 × 357,341.44
  4. Step 4: Simplify right side
    643,838.08x = 317,482,146,416.64
  5. Step 5: Solve for x
    x = 317,482,146,416.64/643,838.08
  6. Step 6: Final answer
    x = 493,108.68

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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.