Home / 715,930.64-987,985.08-393,646.16

Finding the Fourth Proportional to 715,930.64, 987,985.08 and 393,646.16

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Solution

The fourth proportional to 715,930.64, 987,985.08 and 393,646.16 is: 543,232.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,930.64 : 987,985.08 = 393,646.16 : x
  2. Step 2: Convert to fraction form
    715,930.64/987,985.08 = 393,646.16/x
  3. Step 3: Cross multiply
    715,930.64x = 987,985.08 × 393,646.16
  4. Step 4: Simplify right side
    715,930.64x = 388,916,532,879.29
  5. Step 5: Solve for x
    x = 388,916,532,879.29/715,930.64
  6. Step 6: Final answer
    x = 543,232.14

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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.