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Finding the Fourth Proportional to 1,312.23, 1,810.76 and 814.77

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Solution

The fourth proportional to 1,312.23, 1,810.76 and 814.77 is: 1,124.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.23 : 1,810.76 = 814.77 : x
  2. Step 2: Convert to fraction form
    1,312.23/1,810.76 = 814.77/x
  3. Step 3: Cross multiply
    1,312.23x = 1,810.76 × 814.77
  4. Step 4: Simplify right side
    1,312.23x = 1,475,348.85
  5. Step 5: Solve for x
    x = 1,475,348.85/1,312.23
  6. Step 6: Final answer
    x = 1,124.31

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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.