Home / 786,670.76-1,085,288.54-455,308.68

Finding the Fourth Proportional to 786,670.76, 1,085,288.54 and 455,308.68

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Solution

The fourth proportional to 786,670.76, 1,085,288.54 and 455,308.68 is: 628,142.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    786,670.76 : 1,085,288.54 = 455,308.68 : x
  2. Step 2: Convert to fraction form
    786,670.76/1,085,288.54 = 455,308.68/x
  3. Step 3: Cross multiply
    786,670.76x = 1,085,288.54 × 455,308.68
  4. Step 4: Simplify right side
    786,670.76x = 494,141,292,566.53
  5. Step 5: Solve for x
    x = 494,141,292,566.53/786,670.76
  6. Step 6: Final answer
    x = 628,142.44

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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.