Home / 1,929.42-2,658.74-1,397.39

Finding the Fourth Proportional to 1,929.42, 2,658.74 and 1,397.39

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Solution

The fourth proportional to 1,929.42, 2,658.74 and 1,397.39 is: 1,925.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,929.42 : 2,658.74 = 1,397.39 : x
  2. Step 2: Convert to fraction form
    1,929.42/2,658.74 = 1,397.39/x
  3. Step 3: Cross multiply
    1,929.42x = 2,658.74 × 1,397.39
  4. Step 4: Simplify right side
    1,929.42x = 3,715,276.41
  5. Step 5: Solve for x
    x = 3,715,276.41/1,929.42
  6. Step 6: Final answer
    x = 1,925.59

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1.5x scale

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.