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Finding the Fourth Proportional to 346,515, 478,190.70 and 187,539

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Solution

The fourth proportional to 346,515, 478,190.70 and 187,539 is: 258,803.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,515 : 478,190.70 = 187,539 : x
  2. Step 2: Convert to fraction form
    346,515/478,190.70 = 187,539/x
  3. Step 3: Cross multiply
    346,515x = 478,190.70 × 187,539
  4. Step 4: Simplify right side
    346,515x = 89,679,405,687.30
  5. Step 5: Solve for x
    x = 89,679,405,687.30/346,515
  6. Step 6: Final answer
    x = 258,803.82

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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.