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Finding the Fourth Proportional to 325,623.80, 488,435.70 and 286,257.80

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Solution

The fourth proportional to 325,623.80, 488,435.70 and 286,257.80 is: 429,386.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,623.80 : 488,435.70 = 286,257.80 : x
  2. Step 2: Convert to fraction form
    325,623.80/488,435.70 = 286,257.80/x
  3. Step 3: Cross multiply
    325,623.80x = 488,435.70 × 286,257.80
  4. Step 4: Simplify right side
    325,623.80x = 139,818,528,923.46
  5. Step 5: Solve for x
    x = 139,818,528,923.46/325,623.80
  6. Step 6: Final answer
    x = 429,386.70

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1.5x scale

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.