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Finding the Fourth Proportional to 665,719, 918,695.50 and 363,913

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Solution

The fourth proportional to 665,719, 918,695.50 and 363,913 is: 502,201.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,719 : 918,695.50 = 363,913 : x
  2. Step 2: Convert to fraction form
    665,719/918,695.50 = 363,913/x
  3. Step 3: Cross multiply
    665,719x = 918,695.50 × 363,913
  4. Step 4: Simplify right side
    665,719x = 334,325,235,491.50
  5. Step 5: Solve for x
    x = 334,325,235,491.50/665,719
  6. Step 6: Final answer
    x = 502,201.73

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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.