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Finding the Fourth Proportional to 715,633.24, 987,581.52 and 388,946.24

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Solution

The fourth proportional to 715,633.24, 987,581.52 and 388,946.24 is: 536,749.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,633.24 : 987,581.52 = 388,946.24 : x
  2. Step 2: Convert to fraction form
    715,633.24/987,581.52 = 388,946.24/x
  3. Step 3: Cross multiply
    715,633.24x = 987,581.52 × 388,946.24
  4. Step 4: Simplify right side
    715,633.24x = 384,116,118,897.49
  5. Step 5: Solve for x
    x = 384,116,118,897.49/715,633.24
  6. Step 6: Final answer
    x = 536,749.97

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Double scale
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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.