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Finding the Fourth Proportional to 719.34, 993.60 and 555.58

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Solution

The fourth proportional to 719.34, 993.60 and 555.58 is: 767.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.34 : 993.60 = 555.58 : x
  2. Step 2: Convert to fraction form
    719.34/993.60 = 555.58/x
  3. Step 3: Cross multiply
    719.34x = 993.60 × 555.58
  4. Step 4: Simplify right side
    719.34x = 552,024.29
  5. Step 5: Solve for x
    x = 552,024.29/719.34
  6. Step 6: Final answer
    x = 767.40

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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.