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Finding the Fourth Proportional to 1,354.04, 1,868.58 and 764.58

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Solution

The fourth proportional to 1,354.04, 1,868.58 and 764.58 is: 1,055.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,354.04 : 1,868.58 = 764.58 : x
  2. Step 2: Convert to fraction form
    1,354.04/1,868.58 = 764.58/x
  3. Step 3: Cross multiply
    1,354.04x = 1,868.58 × 764.58
  4. Step 4: Simplify right side
    1,354.04x = 1,428,678.90
  5. Step 5: Solve for x
    x = 1,428,678.90/1,354.04
  6. Step 6: Final answer
    x = 1,055.13

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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.