Home / 715,631.46-987,572.84-388,946.31

Finding the Fourth Proportional to 715,631.46, 987,572.84 and 388,946.31

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Solution

The fourth proportional to 715,631.46, 987,572.84 and 388,946.31 is: 536,746.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,631.46 : 987,572.84 = 388,946.31 : x
  2. Step 2: Convert to fraction form
    715,631.46/987,572.84 = 388,946.31/x
  3. Step 3: Cross multiply
    715,631.46x = 987,572.84 × 388,946.31
  4. Step 4: Simplify right side
    715,631.46x = 384,112,811,974.22
  5. Step 5: Solve for x
    x = 384,112,811,974.22/715,631.46
  6. Step 6: Final answer
    x = 536,746.68

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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.