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Finding the Fourth Proportional to 865,287.60, 1,298,055.60 and 266,299.44

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Solution

The fourth proportional to 865,287.60, 1,298,055.60 and 266,299.44 is: 399,487.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,287.60 : 1,298,055.60 = 266,299.44 : x
  2. Step 2: Convert to fraction form
    865,287.60/1,298,055.60 = 266,299.44/x
  3. Step 3: Cross multiply
    865,287.60x = 1,298,055.60 × 266,299.44
  4. Step 4: Simplify right side
    865,287.60x = 345,671,479,368.86
  5. Step 5: Solve for x
    x = 345,671,479,368.86/865,287.60
  6. Step 6: Final answer
    x = 399,487.38

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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.