Home / 1,987.69-2,981.24-526.94

Finding the Fourth Proportional to 1,987.69, 2,981.24 and 526.94

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Solution

The fourth proportional to 1,987.69, 2,981.24 and 526.94 is: 790.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.69 : 2,981.24 = 526.94 : x
  2. Step 2: Convert to fraction form
    1,987.69/2,981.24 = 526.94/x
  3. Step 3: Cross multiply
    1,987.69x = 2,981.24 × 526.94
  4. Step 4: Simplify right side
    1,987.69x = 1,570,931.97
  5. Step 5: Solve for x
    x = 1,570,931.97/1,987.69
  6. Step 6: Final answer
    x = 790.33

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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.