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Finding the Fourth Proportional to 872,303.60, 1,203,785.60 and 485,124.41

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Solution

The fourth proportional to 872,303.60, 1,203,785.60 and 485,124.41 is: 669,475.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,303.60 : 1,203,785.60 = 485,124.41 : x
  2. Step 2: Convert to fraction form
    872,303.60/1,203,785.60 = 485,124.41/x
  3. Step 3: Cross multiply
    872,303.60x = 1,203,785.60 × 485,124.41
  4. Step 4: Simplify right side
    872,303.60x = 583,985,770,521.95
  5. Step 5: Solve for x
    x = 583,985,770,521.95/872,303.60
  6. Step 6: Final answer
    x = 669,475.37

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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.