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Finding the Fourth Proportional to 1,307.01, 1,803.66 and 709.49

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Solution

The fourth proportional to 1,307.01, 1,803.66 and 709.49 is: 979.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,307.01 : 1,803.66 = 709.49 : x
  2. Step 2: Convert to fraction form
    1,307.01/1,803.66 = 709.49/x
  3. Step 3: Cross multiply
    1,307.01x = 1,803.66 × 709.49
  4. Step 4: Simplify right side
    1,307.01x = 1,279,666.17
  5. Step 5: Solve for x
    x = 1,279,666.17/1,307.01
  6. Step 6: Final answer
    x = 979.08

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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.