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Finding the Fourth Proportional to 643,919.82, 888,564.88 and 357,417.34

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Solution

The fourth proportional to 643,919.82, 888,564.88 and 357,417.34 is: 493,211.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,919.82 : 888,564.88 = 357,417.34 : x
  2. Step 2: Convert to fraction form
    643,919.82/888,564.88 = 357,417.34/x
  3. Step 3: Cross multiply
    643,919.82x = 888,564.88 × 357,417.34
  4. Step 4: Simplify right side
    643,919.82x = 317,588,495,827.02
  5. Step 5: Solve for x
    x = 317,588,495,827.02/643,919.82
  6. Step 6: Final answer
    x = 493,211.24

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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.