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Finding the Fourth Proportional to 4,718.79, 7,075.96 and 1,431.20

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Solution

The fourth proportional to 4,718.79, 7,075.96 and 1,431.20 is: 2,146.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,718.79 : 7,075.96 = 1,431.20 : x
  2. Step 2: Convert to fraction form
    4,718.79/7,075.96 = 1,431.20/x
  3. Step 3: Cross multiply
    4,718.79x = 7,075.96 × 1,431.20
  4. Step 4: Simplify right side
    4,718.79x = 10,127,128.06
  5. Step 5: Solve for x
    x = 10,127,128.06/4,718.79
  6. Step 6: Final answer
    x = 2,146.13

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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.