Home / 400,680.12-553,313.80-257,689.20

Finding the Fourth Proportional to 400,680.12, 553,313.80 and 257,689.20

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Solution

The fourth proportional to 400,680.12, 553,313.80 and 257,689.20 is: 355,852.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,680.12 : 553,313.80 = 257,689.20 : x
  2. Step 2: Convert to fraction form
    400,680.12/553,313.80 = 257,689.20/x
  3. Step 3: Cross multiply
    400,680.12x = 553,313.80 × 257,689.20
  4. Step 4: Simplify right side
    400,680.12x = 142,582,990,470.96
  5. Step 5: Solve for x
    x = 142,582,990,470.96/400,680.12
  6. Step 6: Final answer
    x = 355,852.42

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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.