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Finding the Fourth Proportional to 684,619.64, 944,702.39 and 378,647.40

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Solution

The fourth proportional to 684,619.64, 944,702.39 and 378,647.40 is: 522,493.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,619.64 : 944,702.39 = 378,647.40 : x
  2. Step 2: Convert to fraction form
    684,619.64/944,702.39 = 378,647.40/x
  3. Step 3: Cross multiply
    684,619.64x = 944,702.39 × 378,647.40
  4. Step 4: Simplify right side
    684,619.64x = 357,709,104,693.91
  5. Step 5: Solve for x
    x = 357,709,104,693.91/684,619.64
  6. Step 6: Final answer
    x = 522,493.20

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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.