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Finding the Fourth Proportional to 858.04, 1,184.04 and 485.04

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Solution

The fourth proportional to 858.04, 1,184.04 and 485.04 is: 669.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    858.04 : 1,184.04 = 485.04 : x
  2. Step 2: Convert to fraction form
    858.04/1,184.04 = 485.04/x
  3. Step 3: Cross multiply
    858.04x = 1,184.04 × 485.04
  4. Step 4: Simplify right side
    858.04x = 574,306.76
  5. Step 5: Solve for x
    x = 574,306.76/858.04
  6. Step 6: Final answer
    x = 669.32

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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.