Home / 2,931.64-4,045.58-1,605.40

Finding the Fourth Proportional to 2,931.64, 4,045.58 and 1,605.40

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Solution

The fourth proportional to 2,931.64, 4,045.58 and 1,605.40 is: 2,215.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,931.64 : 4,045.58 = 1,605.40 : x
  2. Step 2: Convert to fraction form
    2,931.64/4,045.58 = 1,605.40/x
  3. Step 3: Cross multiply
    2,931.64x = 4,045.58 × 1,605.40
  4. Step 4: Simplify right side
    2,931.64x = 6,494,768.03
  5. Step 5: Solve for x
    x = 6,494,768.03/2,931.64
  6. Step 6: Final answer
    x = 2,215.41

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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.