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Finding the Fourth Proportional to 528,069.60, 789,800.40 and 472,312.80

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Solution

The fourth proportional to 528,069.60, 789,800.40 and 472,312.80 is: 706,408.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,069.60 : 789,800.40 = 472,312.80 : x
  2. Step 2: Convert to fraction form
    528,069.60/789,800.40 = 472,312.80/x
  3. Step 3: Cross multiply
    528,069.60x = 789,800.40 × 472,312.80
  4. Step 4: Simplify right side
    528,069.60x = 373,032,838,365.12
  5. Step 5: Solve for x
    x = 373,032,838,365.12/528,069.60
  6. Step 6: Final answer
    x = 706,408.47

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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.