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Finding the Fourth Proportional to 659,355.93, 910,090.55 and 387,511.43

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Solution

The fourth proportional to 659,355.93, 910,090.55 and 387,511.43 is: 534,871.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,355.93 : 910,090.55 = 387,511.43 : x
  2. Step 2: Convert to fraction form
    659,355.93/910,090.55 = 387,511.43/x
  3. Step 3: Cross multiply
    659,355.93x = 910,090.55 × 387,511.43
  4. Step 4: Simplify right side
    659,355.93x = 352,670,486,878.31
  5. Step 5: Solve for x
    x = 352,670,486,878.31/659,355.93
  6. Step 6: Final answer
    x = 534,871.18

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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.