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Finding the Fourth Proportional to 781,768.64, 1,078,892.88 and 437,635.10

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Solution

The fourth proportional to 781,768.64, 1,078,892.88 and 437,635.10 is: 603,965.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,768.64 : 1,078,892.88 = 437,635.10 : x
  2. Step 2: Convert to fraction form
    781,768.64/1,078,892.88 = 437,635.10/x
  3. Step 3: Cross multiply
    781,768.64x = 1,078,892.88 × 437,635.10
  4. Step 4: Simplify right side
    781,768.64x = 472,161,393,428.09
  5. Step 5: Solve for x
    x = 472,161,393,428.09/781,768.64
  6. Step 6: Final answer
    x = 603,965.64

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Double scale
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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.