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Finding the Fourth Proportional to 528,139.20, 790,365.60 and 483,902.40

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Solution

The fourth proportional to 528,139.20, 790,365.60 and 483,902.40 is: 724,164.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,139.20 : 790,365.60 = 483,902.40 : x
  2. Step 2: Convert to fraction form
    528,139.20/790,365.60 = 483,902.40/x
  3. Step 3: Cross multiply
    528,139.20x = 790,365.60 × 483,902.40
  4. Step 4: Simplify right side
    528,139.20x = 382,459,810,717.44
  5. Step 5: Solve for x
    x = 382,459,810,717.44/528,139.20
  6. Step 6: Final answer
    x = 724,164.79

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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.