Home / 1,916.72-2,875.20-618.24

Finding the Fourth Proportional to 1,916.72, 2,875.20 and 618.24

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Solution

The fourth proportional to 1,916.72, 2,875.20 and 618.24 is: 927.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,916.72 : 2,875.20 = 618.24 : x
  2. Step 2: Convert to fraction form
    1,916.72/2,875.20 = 618.24/x
  3. Step 3: Cross multiply
    1,916.72x = 2,875.20 × 618.24
  4. Step 4: Simplify right side
    1,916.72x = 1,777,563.65
  5. Step 5: Solve for x
    x = 1,777,563.65/1,916.72
  6. Step 6: Final answer
    x = 927.40

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1.5x scale

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.