Home / 715,818.30-987,831.27-409,899.30

Finding the Fourth Proportional to 715,818.30, 987,831.27 and 409,899.30

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Solution

The fourth proportional to 715,818.30, 987,831.27 and 409,899.30 is: 565,662.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,818.30 : 987,831.27 = 409,899.30 : x
  2. Step 2: Convert to fraction form
    715,818.30/987,831.27 = 409,899.30/x
  3. Step 3: Cross multiply
    715,818.30x = 987,831.27 × 409,899.30
  4. Step 4: Simplify right side
    715,818.30x = 404,911,346,091.11
  5. Step 5: Solve for x
    x = 404,911,346,091.11/715,818.30
  6. Step 6: Final answer
    x = 565,662.19

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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.