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Finding the Fourth Proportional to 1,058.46, 1,459.80 and 709.08

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Solution

The fourth proportional to 1,058.46, 1,459.80 and 709.08 is: 977.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,058.46 : 1,459.80 = 709.08 : x
  2. Step 2: Convert to fraction form
    1,058.46/1,459.80 = 709.08/x
  3. Step 3: Cross multiply
    1,058.46x = 1,459.80 × 709.08
  4. Step 4: Simplify right side
    1,058.46x = 1,035,114.98
  5. Step 5: Solve for x
    x = 1,035,114.98/1,058.46
  6. Step 6: Final answer
    x = 977.94

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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.