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Finding the Fourth Proportional to 664,078.79, 916,424.50 and 377,598.90

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Solution

The fourth proportional to 664,078.79, 916,424.50 and 377,598.90 is: 521,084.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,078.79 : 916,424.50 = 377,598.90 : x
  2. Step 2: Convert to fraction form
    664,078.79/916,424.50 = 377,598.90/x
  3. Step 3: Cross multiply
    664,078.79x = 916,424.50 × 377,598.90
  4. Step 4: Simplify right side
    664,078.79x = 346,040,881,178.76
  5. Step 5: Solve for x
    x = 346,040,881,178.76/664,078.79
  6. Step 6: Final answer
    x = 521,084.08

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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.