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Finding the Fourth Proportional to 4,480, 6,720 and 1,402

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Solution

The fourth proportional to 4,480, 6,720 and 1,402 is: 2,103

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,480 : 6,720 = 1,402 : x
  2. Step 2: Convert to fraction form
    4,480/6,720 = 1,402/x
  3. Step 3: Cross multiply
    4,480x = 6,720 × 1,402
  4. Step 4: Simplify right side
    4,480x = 9,421,440
  5. Step 5: Solve for x
    x = 9,421,440/4,480
  6. Step 6: Final answer
    x = 2,103

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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.