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Finding the Fourth Proportional to 3,146.40, 4,718.40 and 924.50

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Solution

The fourth proportional to 3,146.40, 4,718.40 and 924.50 is: 1,386.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,146.40 : 4,718.40 = 924.50 : x
  2. Step 2: Convert to fraction form
    3,146.40/4,718.40 = 924.50/x
  3. Step 3: Cross multiply
    3,146.40x = 4,718.40 × 924.50
  4. Step 4: Simplify right side
    3,146.40x = 4,362,160.80
  5. Step 5: Solve for x
    x = 4,362,160.80/3,146.40
  6. Step 6: Final answer
    x = 1,386.40

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1.5x scale

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.