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Finding the Fourth Proportional to 627,015.18, 865,290.90 and 355,075.71

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Solution

The fourth proportional to 627,015.18, 865,290.90 and 355,075.71 is: 490,010.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,015.18 : 865,290.90 = 355,075.71 : x
  2. Step 2: Convert to fraction form
    627,015.18/865,290.90 = 355,075.71/x
  3. Step 3: Cross multiply
    627,015.18x = 865,290.90 × 355,075.71
  4. Step 4: Simplify right side
    627,015.18x = 307,243,780,674.04
  5. Step 5: Solve for x
    x = 307,243,780,674.04/627,015.18
  6. Step 6: Final answer
    x = 490,010.12

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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.