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Finding the Fourth Proportional to 715,152.47, 986,906.70 and 388,462.86

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Solution

The fourth proportional to 715,152.47, 986,906.70 and 388,462.86 is: 536,076.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,152.47 : 986,906.70 = 388,462.86 : x
  2. Step 2: Convert to fraction form
    715,152.47/986,906.70 = 388,462.86/x
  3. Step 3: Cross multiply
    715,152.47x = 986,906.70 × 388,462.86
  4. Step 4: Simplify right side
    715,152.47x = 383,376,599,235.16
  5. Step 5: Solve for x
    x = 383,376,599,235.16/715,152.47
  6. Step 6: Final answer
    x = 536,076.74

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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.