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Finding the Fourth Proportional to 2,898.76, 4,000.65 and 1,904.86

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Solution

The fourth proportional to 2,898.76, 4,000.65 and 1,904.86 is: 2,628.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,898.76 : 4,000.65 = 1,904.86 : x
  2. Step 2: Convert to fraction form
    2,898.76/4,000.65 = 1,904.86/x
  3. Step 3: Cross multiply
    2,898.76x = 4,000.65 × 1,904.86
  4. Step 4: Simplify right side
    2,898.76x = 7,620,678.16
  5. Step 5: Solve for x
    x = 7,620,678.16/2,898.76
  6. Step 6: Final answer
    x = 2,628.94

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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.