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Finding the Fourth Proportional to 346,962, 478,807.56 and 187,986

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Solution

The fourth proportional to 346,962, 478,807.56 and 187,986 is: 259,420.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,962 : 478,807.56 = 187,986 : x
  2. Step 2: Convert to fraction form
    346,962/478,807.56 = 187,986/x
  3. Step 3: Cross multiply
    346,962x = 478,807.56 × 187,986
  4. Step 4: Simplify right side
    346,962x = 90,009,117,974.16
  5. Step 5: Solve for x
    x = 90,009,117,974.16/346,962
  6. Step 6: Final answer
    x = 259,420.68

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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.