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Finding the Fourth Proportional to 1,477.40, 2,038.80 and 814.25

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Solution

The fourth proportional to 1,477.40, 2,038.80 and 814.25 is: 1,123.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,477.40 : 2,038.80 = 814.25 : x
  2. Step 2: Convert to fraction form
    1,477.40/2,038.80 = 814.25/x
  3. Step 3: Cross multiply
    1,477.40x = 2,038.80 × 814.25
  4. Step 4: Simplify right side
    1,477.40x = 1,660,082.71
  5. Step 5: Solve for x
    x = 1,660,082.71/1,477.40
  6. Step 6: Final answer
    x = 1,123.66

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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.