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Finding the Fourth Proportional to 684,440.94, 944,645.04 and 398,127

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Solution

The fourth proportional to 684,440.94, 944,645.04 and 398,127 is: 549,483.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,440.94 : 944,645.04 = 398,127 : x
  2. Step 2: Convert to fraction form
    684,440.94/944,645.04 = 398,127/x
  3. Step 3: Cross multiply
    684,440.94x = 944,645.04 × 398,127
  4. Step 4: Simplify right side
    684,440.94x = 376,088,695,840.08
  5. Step 5: Solve for x
    x = 376,088,695,840.08/684,440.94
  6. Step 6: Final answer
    x = 549,483.05

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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.