Home / 400,668.12-553,297.23-257,677.20

Finding the Fourth Proportional to 400,668.12, 553,297.23 and 257,677.20

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Solution

The fourth proportional to 400,668.12, 553,297.23 and 257,677.20 is: 355,835.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,668.12 : 553,297.23 = 257,677.20 : x
  2. Step 2: Convert to fraction form
    400,668.12/553,297.23 = 257,677.20/x
  3. Step 3: Cross multiply
    400,668.12x = 553,297.23 × 257,677.20
  4. Step 4: Simplify right side
    400,668.12x = 142,572,080,994.16
  5. Step 5: Solve for x
    x = 142,572,080,994.16/400,668.12
  6. Step 6: Final answer
    x = 355,835.85

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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.