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Finding the Fourth Proportional to 1,235.60, 1,854.12 and 456.15

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Solution

The fourth proportional to 1,235.60, 1,854.12 and 456.15 is: 684.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,235.60 : 1,854.12 = 456.15 : x
  2. Step 2: Convert to fraction form
    1,235.60/1,854.12 = 456.15/x
  3. Step 3: Cross multiply
    1,235.60x = 1,854.12 × 456.15
  4. Step 4: Simplify right side
    1,235.60x = 845,756.84
  5. Step 5: Solve for x
    x = 845,756.84/1,235.60
  6. Step 6: Final answer
    x = 684.49

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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.