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Finding the Fourth Proportional to 643,580.03, 888,143.74 and 357,100.04

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Solution

The fourth proportional to 643,580.03, 888,143.74 and 357,100.04 is: 492,799.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,580.03 : 888,143.74 = 357,100.04 : x
  2. Step 2: Convert to fraction form
    643,580.03/888,143.74 = 357,100.04/x
  3. Step 3: Cross multiply
    643,580.03x = 888,143.74 × 357,100.04
  4. Step 4: Simplify right side
    643,580.03x = 317,156,166,407.36
  5. Step 5: Solve for x
    x = 317,156,166,407.36/643,580.03
  6. Step 6: Final answer
    x = 492,799.89

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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.