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Finding the Fourth Proportional to 917,361.90, 1,376,042.85 and 858,312.90

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Solution

The fourth proportional to 917,361.90, 1,376,042.85 and 858,312.90 is: 1,287,469.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,361.90 : 1,376,042.85 = 858,312.90 : x
  2. Step 2: Convert to fraction form
    917,361.90/1,376,042.85 = 858,312.90/x
  3. Step 3: Cross multiply
    917,361.90x = 1,376,042.85 × 858,312.90
  4. Step 4: Simplify right side
    917,361.90x = 1,181,075,329,107.77
  5. Step 5: Solve for x
    x = 1,181,075,329,107.77/917,361.90
  6. Step 6: Final answer
    x = 1,287,469.35

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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.