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Finding the Fourth Proportional to 291,483, 402,421.50 and 191,055.96

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Solution

The fourth proportional to 291,483, 402,421.50 and 191,055.96 is: 263,771.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,483 : 402,421.50 = 191,055.96 : x
  2. Step 2: Convert to fraction form
    291,483/402,421.50 = 191,055.96/x
  3. Step 3: Cross multiply
    291,483x = 402,421.50 × 191,055.96
  4. Step 4: Simplify right side
    291,483x = 76,885,026,007.14
  5. Step 5: Solve for x
    x = 76,885,026,007.14/291,483
  6. Step 6: Final answer
    x = 263,771.90

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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.