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Finding the Fourth Proportional to 657,489,809.60, 984,347,277.60 and 638,615,441.60

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Solution

The fourth proportional to 657,489,809.60, 984,347,277.60 and 638,615,441.60 is: 956,089,907.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,489,809.60 : 984,347,277.60 = 638,615,441.60 : x
  2. Step 2: Convert to fraction form
    657,489,809.60/984,347,277.60 = 638,615,441.60/x
  3. Step 3: Cross multiply
    657,489,809.60x = 984,347,277.60 × 638,615,441.60
  4. Step 4: Simplify right side
    657,489,809.60x = 628,619,371,372,281,856
  5. Step 5: Solve for x
    x = 628,619,371,372,281,856/657,489,809.60
  6. Step 6: Final answer
    x = 956,089,907.70

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.