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Finding the Fourth Proportional to 346,836.56, 478,492.80 and 274,928

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Solution

The fourth proportional to 346,836.56, 478,492.80 and 274,928 is: 379,288.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,836.56 : 478,492.80 = 274,928 : x
  2. Step 2: Convert to fraction form
    346,836.56/478,492.80 = 274,928/x
  3. Step 3: Cross multiply
    346,836.56x = 478,492.80 × 274,928
  4. Step 4: Simplify right side
    346,836.56x = 131,551,068,518.40
  5. Step 5: Solve for x
    x = 131,551,068,518.40/346,836.56
  6. Step 6: Final answer
    x = 379,288.36

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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.