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Finding the Fourth Proportional to 817,685.80, 1,128,404.74 and 459,989.80

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Solution

The fourth proportional to 817,685.80, 1,128,404.74 and 459,989.80 is: 634,784.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,685.80 : 1,128,404.74 = 459,989.80 : x
  2. Step 2: Convert to fraction form
    817,685.80/1,128,404.74 = 459,989.80/x
  3. Step 3: Cross multiply
    817,685.80x = 1,128,404.74 × 459,989.80
  4. Step 4: Simplify right side
    817,685.80x = 519,054,670,671.65
  5. Step 5: Solve for x
    x = 519,054,670,671.65/817,685.80
  6. Step 6: Final answer
    x = 634,784.99

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