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Finding the Fourth Proportional to 887,715.80, 1,330,698.90 and 438,068.60

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Solution

The fourth proportional to 887,715.80, 1,330,698.90 and 438,068.60 is: 656,671.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    887,715.80 : 1,330,698.90 = 438,068.60 : x
  2. Step 2: Convert to fraction form
    887,715.80/1,330,698.90 = 438,068.60/x
  3. Step 3: Cross multiply
    887,715.80x = 1,330,698.90 × 438,068.60
  4. Step 4: Simplify right side
    887,715.80x = 582,937,404,144.54
  5. Step 5: Solve for x
    x = 582,937,404,144.54/887,715.80
  6. Step 6: Final answer
    x = 656,671.21

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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.