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Finding the Fourth Proportional to 638,603.09, 956,820.63 and 385,351.46

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Solution

The fourth proportional to 638,603.09, 956,820.63 and 385,351.46 is: 577,373.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,603.09 : 956,820.63 = 385,351.46 : x
  2. Step 2: Convert to fraction form
    638,603.09/956,820.63 = 385,351.46/x
  3. Step 3: Cross multiply
    638,603.09x = 956,820.63 × 385,351.46
  4. Step 4: Simplify right side
    638,603.09x = 368,712,226,977.66
  5. Step 5: Solve for x
    x = 368,712,226,977.66/638,603.09
  6. Step 6: Final answer
    x = 577,373.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.