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Finding the Fourth Proportional to 767.34, 1,058.54 and 518.67

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Solution

The fourth proportional to 767.34, 1,058.54 and 518.67 is: 715.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    767.34 : 1,058.54 = 518.67 : x
  2. Step 2: Convert to fraction form
    767.34/1,058.54 = 518.67/x
  3. Step 3: Cross multiply
    767.34x = 1,058.54 × 518.67
  4. Step 4: Simplify right side
    767.34x = 549,030.35
  5. Step 5: Solve for x
    x = 549,030.35/767.34
  6. Step 6: Final answer
    x = 715.50

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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.