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Finding the Fourth Proportional to 643,820.54, 888,465.92 and 357,333.26

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Solution

The fourth proportional to 643,820.54, 888,465.92 and 357,333.26 is: 493,116.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,820.54 : 888,465.92 = 357,333.26 : x
  2. Step 2: Convert to fraction form
    643,820.54/888,465.92 = 357,333.26/x
  3. Step 3: Cross multiply
    643,820.54x = 888,465.92 × 357,333.26
  4. Step 4: Simplify right side
    643,820.54x = 317,478,423,592.50
  5. Step 5: Solve for x
    x = 317,478,423,592.50/643,820.54
  6. Step 6: Final answer
    x = 493,116.33

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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.