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Finding the Fourth Proportional to 786,456.54, 1,085,426.54 and 480,709.08

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Solution

The fourth proportional to 786,456.54, 1,085,426.54 and 480,709.08 is: 663,449.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    786,456.54 : 1,085,426.54 = 480,709.08 : x
  2. Step 2: Convert to fraction form
    786,456.54/1,085,426.54 = 480,709.08/x
  3. Step 3: Cross multiply
    786,456.54x = 1,085,426.54 × 480,709.08
  4. Step 4: Simplify right side
    786,456.54x = 521,774,393,450.98
  5. Step 5: Solve for x
    x = 521,774,393,450.98/786,456.54
  6. Step 6: Final answer
    x = 663,449.75

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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.