Home / 2,870.25-4,307.40-1,638.65

Finding the Fourth Proportional to 2,870.25, 4,307.40 and 1,638.65

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Solution

The fourth proportional to 2,870.25, 4,307.40 and 1,638.65 is: 2,459.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,870.25 : 4,307.40 = 1,638.65 : x
  2. Step 2: Convert to fraction form
    2,870.25/4,307.40 = 1,638.65/x
  3. Step 3: Cross multiply
    2,870.25x = 4,307.40 × 1,638.65
  4. Step 4: Simplify right side
    2,870.25x = 7,058,299.47
  5. Step 5: Solve for x
    x = 7,058,299.47/2,870.25
  6. Step 6: Final answer
    x = 2,459.12

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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.