Home / 715,435.36-987,280.32-405,309.04

Finding the Fourth Proportional to 715,435.36, 987,280.32 and 405,309.04

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Solution

The fourth proportional to 715,435.36, 987,280.32 and 405,309.04 is: 559,314.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,435.36 : 987,280.32 = 405,309.04 : x
  2. Step 2: Convert to fraction form
    715,435.36/987,280.32 = 405,309.04/x
  3. Step 3: Cross multiply
    715,435.36x = 987,280.32 × 405,309.04
  4. Step 4: Simplify right side
    715,435.36x = 400,153,638,710.09
  5. Step 5: Solve for x
    x = 400,153,638,710.09/715,435.36
  6. Step 6: Final answer
    x = 559,314.87

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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.