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Finding the Fourth Proportional to 528,090.60, 789,831.90 and 472,333.80

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Solution

The fourth proportional to 528,090.60, 789,831.90 and 472,333.80 is: 706,439.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,090.60 : 789,831.90 = 472,333.80 : x
  2. Step 2: Convert to fraction form
    528,090.60/789,831.90 = 472,333.80/x
  3. Step 3: Cross multiply
    528,090.60x = 789,831.90 × 472,333.80
  4. Step 4: Simplify right side
    528,090.60x = 373,064,302,688.22
  5. Step 5: Solve for x
    x = 373,064,302,688.22/528,090.60
  6. Step 6: Final answer
    x = 706,439.96

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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.