Home / 630,540.10-870,145.32-404,185.60

Finding the Fourth Proportional to 630,540.10, 870,145.32 and 404,185.60

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Solution

The fourth proportional to 630,540.10, 870,145.32 and 404,185.60 is: 557,776.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,540.10 : 870,145.32 = 404,185.60 : x
  2. Step 2: Convert to fraction form
    630,540.10/870,145.32 = 404,185.60/x
  3. Step 3: Cross multiply
    630,540.10x = 870,145.32 × 404,185.60
  4. Step 4: Simplify right side
    630,540.10x = 351,700,208,251.39
  5. Step 5: Solve for x
    x = 351,700,208,251.39/630,540.10
  6. Step 6: Final answer
    x = 557,776.12

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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.