Home / 715,909.47-987,946.22-393,616.76

Finding the Fourth Proportional to 715,909.47, 987,946.22 and 393,616.76

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Solution

The fourth proportional to 715,909.47, 987,946.22 and 393,616.76 is: 543,186.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,909.47 : 987,946.22 = 393,616.76 : x
  2. Step 2: Convert to fraction form
    715,909.47/987,946.22 = 393,616.76/x
  3. Step 3: Cross multiply
    715,909.47x = 987,946.22 × 393,616.76
  4. Step 4: Simplify right side
    715,909.47x = 388,872,183,262.83
  5. Step 5: Solve for x
    x = 388,872,183,262.83/715,909.47
  6. Step 6: Final answer
    x = 543,186.25

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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.