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Finding the Fourth Proportional to 389,413.60, 537,505.76 and 228,303.52

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Solution

The fourth proportional to 389,413.60, 537,505.76 and 228,303.52 is: 315,126.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,413.60 : 537,505.76 = 228,303.52 : x
  2. Step 2: Convert to fraction form
    389,413.60/537,505.76 = 228,303.52/x
  3. Step 3: Cross multiply
    389,413.60x = 537,505.76 × 228,303.52
  4. Step 4: Simplify right side
    389,413.60x = 122,714,457,028.28
  5. Step 5: Solve for x
    x = 122,714,457,028.28/389,413.60
  6. Step 6: Final answer
    x = 315,126.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.