Home / 2,931.50-4,045.48-1,689.50

Finding the Fourth Proportional to 2,931.50, 4,045.48 and 1,689.50

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Solution

The fourth proportional to 2,931.50, 4,045.48 and 1,689.50 is: 2,331.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,931.50 : 4,045.48 = 1,689.50 : x
  2. Step 2: Convert to fraction form
    2,931.50/4,045.48 = 1,689.50/x
  3. Step 3: Cross multiply
    2,931.50x = 4,045.48 × 1,689.50
  4. Step 4: Simplify right side
    2,931.50x = 6,834,838.46
  5. Step 5: Solve for x
    x = 6,834,838.46/2,931.50
  6. Step 6: Final answer
    x = 2,331.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.