Home / 715,985.63-988,085.59-393,720.24

Finding the Fourth Proportional to 715,985.63, 988,085.59 and 393,720.24

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Solution

The fourth proportional to 715,985.63, 988,085.59 and 393,720.24 is: 543,347.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,985.63 : 988,085.59 = 393,720.24 : x
  2. Step 2: Convert to fraction form
    715,985.63/988,085.59 = 393,720.24/x
  3. Step 3: Cross multiply
    715,985.63x = 988,085.59 × 393,720.24
  4. Step 4: Simplify right side
    715,985.63x = 389,029,298,356.36
  5. Step 5: Solve for x
    x = 389,029,298,356.36/715,985.63
  6. Step 6: Final answer
    x = 543,347.91

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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.