Home / 878,040.75-1,317,075.69-309,428.72

Finding the Fourth Proportional to 878,040.75, 1,317,075.69 and 309,428.72

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Solution

The fourth proportional to 878,040.75, 1,317,075.69 and 309,428.72 is: 464,148.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,040.75 : 1,317,075.69 = 309,428.72 : x
  2. Step 2: Convert to fraction form
    878,040.75/1,317,075.69 = 309,428.72/x
  3. Step 3: Cross multiply
    878,040.75x = 1,317,075.69 × 309,428.72
  4. Step 4: Simplify right side
    878,040.75x = 407,541,038,314.44
  5. Step 5: Solve for x
    x = 407,541,038,314.44/878,040.75
  6. Step 6: Final answer
    x = 464,148.21

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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.