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Finding the Fourth Proportional to 611,758.58, 917,731.23 and 312,075.66

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Solution

The fourth proportional to 611,758.58, 917,731.23 and 312,075.66 is: 468,161.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,758.58 : 917,731.23 = 312,075.66 : x
  2. Step 2: Convert to fraction form
    611,758.58/917,731.23 = 312,075.66/x
  3. Step 3: Cross multiply
    611,758.58x = 917,731.23 × 312,075.66
  4. Step 4: Simplify right side
    611,758.58x = 286,401,579,304.86
  5. Step 5: Solve for x
    x = 286,401,579,304.86/611,758.58
  6. Step 6: Final answer
    x = 468,161.12

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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.