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Finding the Fourth Proportional to 5,205.29, 7,807.95 and 1,916.96

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Solution

The fourth proportional to 5,205.29, 7,807.95 and 1,916.96 is: 2,875.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,205.29 : 7,807.95 = 1,916.96 : x
  2. Step 2: Convert to fraction form
    5,205.29/7,807.95 = 1,916.96/x
  3. Step 3: Cross multiply
    5,205.29x = 7,807.95 × 1,916.96
  4. Step 4: Simplify right side
    5,205.29x = 14,967,527.83
  5. Step 5: Solve for x
    x = 14,967,527.83/5,205.29
  6. Step 6: Final answer
    x = 2,875.45

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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.