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Finding the Fourth Proportional to 421,066.54, 581,176.18 and 239,886.15

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Solution

The fourth proportional to 421,066.54, 581,176.18 and 239,886.15 is: 331,102.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,066.54 : 581,176.18 = 239,886.15 : x
  2. Step 2: Convert to fraction form
    421,066.54/581,176.18 = 239,886.15/x
  3. Step 3: Cross multiply
    421,066.54x = 581,176.18 × 239,886.15
  4. Step 4: Simplify right side
    421,066.54x = 139,416,116,291.91
  5. Step 5: Solve for x
    x = 139,416,116,291.91/421,066.54
  6. Step 6: Final answer
    x = 331,102.34

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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.