Home / 872,415.60-1,307,932.20-478,431.60

Finding the Fourth Proportional to 872,415.60, 1,307,932.20 and 478,431.60

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Solution

The fourth proportional to 872,415.60, 1,307,932.20 and 478,431.60 is: 717,268.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,415.60 : 1,307,932.20 = 478,431.60 : x
  2. Step 2: Convert to fraction form
    872,415.60/1,307,932.20 = 478,431.60/x
  3. Step 3: Cross multiply
    872,415.60x = 1,307,932.20 × 478,431.60
  4. Step 4: Simplify right side
    872,415.60x = 625,756,095,137.52
  5. Step 5: Solve for x
    x = 625,756,095,137.52/872,415.60
  6. Step 6: Final answer
    x = 717,268.35

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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.