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Finding the Fourth Proportional to 899.19, 1,240.73 and 500.79

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Solution

The fourth proportional to 899.19, 1,240.73 and 500.79 is: 691.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.19 : 1,240.73 = 500.79 : x
  2. Step 2: Convert to fraction form
    899.19/1,240.73 = 500.79/x
  3. Step 3: Cross multiply
    899.19x = 1,240.73 × 500.79
  4. Step 4: Simplify right side
    899.19x = 621,345.04
  5. Step 5: Solve for x
    x = 621,345.04/899.19
  6. Step 6: Final answer
    x = 691.01

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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.