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Finding the Fourth Proportional to 1,307.60, 1,973.04 and 1,256.98

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Solution

The fourth proportional to 1,307.60, 1,973.04 and 1,256.98 is: 1,896.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,307.60 : 1,973.04 = 1,256.98 : x
  2. Step 2: Convert to fraction form
    1,307.60/1,973.04 = 1,256.98/x
  3. Step 3: Cross multiply
    1,307.60x = 1,973.04 × 1,256.98
  4. Step 4: Simplify right side
    1,307.60x = 2,480,071.82
  5. Step 5: Solve for x
    x = 2,480,071.82/1,307.60
  6. Step 6: Final answer
    x = 1,896.66

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.