Home / 515,478.02-711,325.44-286,020.72

Finding the Fourth Proportional to 515,478.02, 711,325.44 and 286,020.72

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Solution

The fourth proportional to 515,478.02, 711,325.44 and 286,020.72 is: 394,689.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,478.02 : 711,325.44 = 286,020.72 : x
  2. Step 2: Convert to fraction form
    515,478.02/711,325.44 = 286,020.72/x
  3. Step 3: Cross multiply
    515,478.02x = 711,325.44 × 286,020.72
  4. Step 4: Simplify right side
    515,478.02x = 203,453,814,503.12
  5. Step 5: Solve for x
    x = 203,453,814,503.12/515,478.02
  6. Step 6: Final answer
    x = 394,689.61

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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.