Home / 715,838.36-987,848.08-393,545.64

Finding the Fourth Proportional to 715,838.36, 987,848.08 and 393,545.64

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Solution

The fourth proportional to 715,838.36, 987,848.08 and 393,545.64 is: 543,088.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,838.36 : 987,848.08 = 393,545.64 : x
  2. Step 2: Convert to fraction form
    715,838.36/987,848.08 = 393,545.64/x
  3. Step 3: Cross multiply
    715,838.36x = 987,848.08 × 393,545.64
  4. Step 4: Simplify right side
    715,838.36x = 388,763,303,137.14
  5. Step 5: Solve for x
    x = 388,763,303,137.14/715,838.36
  6. Step 6: Final answer
    x = 543,088.11

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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.