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Finding the Fourth Proportional to 1,361.53, 1,878.92 and 802.02

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Solution

The fourth proportional to 1,361.53, 1,878.92 and 802.02 is: 1,106.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,361.53 : 1,878.92 = 802.02 : x
  2. Step 2: Convert to fraction form
    1,361.53/1,878.92 = 802.02/x
  3. Step 3: Cross multiply
    1,361.53x = 1,878.92 × 802.02
  4. Step 4: Simplify right side
    1,361.53x = 1,506,931.42
  5. Step 5: Solve for x
    x = 1,506,931.42/1,361.53
  6. Step 6: Final answer
    x = 1,106.79

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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.