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Finding the Fourth Proportional to 855,652.60, 1,283,478.90 and 435,748.60

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Solution

The fourth proportional to 855,652.60, 1,283,478.90 and 435,748.60 is: 653,622.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    855,652.60 : 1,283,478.90 = 435,748.60 : x
  2. Step 2: Convert to fraction form
    855,652.60/1,283,478.90 = 435,748.60/x
  3. Step 3: Cross multiply
    855,652.60x = 1,283,478.90 × 435,748.60
  4. Step 4: Simplify right side
    855,652.60x = 559,274,133,804.54
  5. Step 5: Solve for x
    x = 559,274,133,804.54/855,652.60
  6. Step 6: Final answer
    x = 653,622.90

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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.