Home / 648,021.60-972,032.40-545,378.40

Finding the Fourth Proportional to 648,021.60, 972,032.40 and 545,378.40

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Solution

The fourth proportional to 648,021.60, 972,032.40 and 545,378.40 is: 818,067.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,021.60 : 972,032.40 = 545,378.40 : x
  2. Step 2: Convert to fraction form
    648,021.60/972,032.40 = 545,378.40/x
  3. Step 3: Cross multiply
    648,021.60x = 972,032.40 × 545,378.40
  4. Step 4: Simplify right side
    648,021.60x = 530,125,475,060.16
  5. Step 5: Solve for x
    x = 530,125,475,060.16/648,021.60
  6. Step 6: Final answer
    x = 818,067.60

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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.