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Finding the Fourth Proportional to 528,072.60, 789,804.90 and 472,315.80

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Solution

The fourth proportional to 528,072.60, 789,804.90 and 472,315.80 is: 706,412.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,072.60 : 789,804.90 = 472,315.80 : x
  2. Step 2: Convert to fraction form
    528,072.60/789,804.90 = 472,315.80/x
  3. Step 3: Cross multiply
    528,072.60x = 789,804.90 × 472,315.80
  4. Step 4: Simplify right side
    528,072.60x = 373,037,333,187.42
  5. Step 5: Solve for x
    x = 373,037,333,187.42/528,072.60
  6. Step 6: Final answer
    x = 706,412.97

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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.