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Finding the Fourth Proportional to 873.51, 1,205.10 and 558.69

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Solution

The fourth proportional to 873.51, 1,205.10 and 558.69 is: 770.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    873.51 : 1,205.10 = 558.69 : x
  2. Step 2: Convert to fraction form
    873.51/1,205.10 = 558.69/x
  3. Step 3: Cross multiply
    873.51x = 1,205.10 × 558.69
  4. Step 4: Simplify right side
    873.51x = 673,277.32
  5. Step 5: Solve for x
    x = 673,277.32/873.51
  6. Step 6: Final answer
    x = 770.77

Related Problems

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Half scale
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Double scale
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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.