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Finding the Fourth Proportional to 400,741.15, 553,018.85 and 216,978.83

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Solution

The fourth proportional to 400,741.15, 553,018.85 and 216,978.83 is: 299,428.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,741.15 : 553,018.85 = 216,978.83 : x
  2. Step 2: Convert to fraction form
    400,741.15/553,018.85 = 216,978.83/x
  3. Step 3: Cross multiply
    400,741.15x = 553,018.85 × 216,978.83
  4. Step 4: Simplify right side
    400,741.15x = 119,993,379,190.96
  5. Step 5: Solve for x
    x = 119,993,379,190.96/400,741.15
  6. Step 6: Final answer
    x = 299,428.64

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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.