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Finding the Fourth Proportional to 812.77, 1,122.14 and 625.93

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Solution

The fourth proportional to 812.77, 1,122.14 and 625.93 is: 864.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    812.77 : 1,122.14 = 625.93 : x
  2. Step 2: Convert to fraction form
    812.77/1,122.14 = 625.93/x
  3. Step 3: Cross multiply
    812.77x = 1,122.14 × 625.93
  4. Step 4: Simplify right side
    812.77x = 702,379.85
  5. Step 5: Solve for x
    x = 702,379.85/812.77
  6. Step 6: Final answer
    x = 864.18

Related Problems

Find fourth proportional to 406.38, 561.07 and 312.96
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.