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Finding the Fourth Proportional to 684,861.60, 945,085.12 and 378,933.12

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Solution

The fourth proportional to 684,861.60, 945,085.12 and 378,933.12 is: 522,914.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,861.60 : 945,085.12 = 378,933.12 : x
  2. Step 2: Convert to fraction form
    684,861.60/945,085.12 = 378,933.12/x
  3. Step 3: Cross multiply
    684,861.60x = 945,085.12 × 378,933.12
  4. Step 4: Simplify right side
    684,861.60x = 358,124,053,187.17
  5. Step 5: Solve for x
    x = 358,124,053,187.17/684,861.60
  6. Step 6: Final answer
    x = 522,914.49

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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.