Home / 400,631.04-553,245.48-257,639.31

Finding the Fourth Proportional to 400,631.04, 553,245.48 and 257,639.31

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Solution

The fourth proportional to 400,631.04, 553,245.48 and 257,639.31 is: 355,783.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,631.04 : 553,245.48 = 257,639.31 : x
  2. Step 2: Convert to fraction form
    400,631.04/553,245.48 = 257,639.31/x
  3. Step 3: Cross multiply
    400,631.04x = 553,245.48 × 257,639.31
  4. Step 4: Simplify right side
    400,631.04x = 142,537,783,727.82
  5. Step 5: Solve for x
    x = 142,537,783,727.82/400,631.04
  6. Step 6: Final answer
    x = 355,783.18

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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.