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Finding the Fourth Proportional to 715,041.33, 986,764.15 and 388,360.72

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Solution

The fourth proportional to 715,041.33, 986,764.15 and 388,360.72 is: 535,941.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,041.33 : 986,764.15 = 388,360.72 : x
  2. Step 2: Convert to fraction form
    715,041.33/986,764.15 = 388,360.72/x
  3. Step 3: Cross multiply
    715,041.33x = 986,764.15 × 388,360.72
  4. Step 4: Simplify right side
    715,041.33x = 383,220,435,764.19
  5. Step 5: Solve for x
    x = 383,220,435,764.19/715,041.33
  6. Step 6: Final answer
    x = 535,941.66

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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.