Home / 684,895.28-945,235.32-398,427.44

Finding the Fourth Proportional to 684,895.28, 945,235.32 and 398,427.44

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Solution

The fourth proportional to 684,895.28, 945,235.32 and 398,427.44 is: 549,876.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,895.28 : 945,235.32 = 398,427.44 : x
  2. Step 2: Convert to fraction form
    684,895.28/945,235.32 = 398,427.44/x
  3. Step 3: Cross multiply
    684,895.28x = 945,235.32 × 398,427.44
  4. Step 4: Simplify right side
    684,895.28x = 376,607,688,745.18
  5. Step 5: Solve for x
    x = 376,607,688,745.18/684,895.28
  6. Step 6: Final answer
    x = 549,876.31

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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.