Home / 853,100.64-1,280,438.16-432,671.76

Finding the Fourth Proportional to 853,100.64, 1,280,438.16 and 432,671.76

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Solution

The fourth proportional to 853,100.64, 1,280,438.16 and 432,671.76 is: 649,406.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    853,100.64 : 1,280,438.16 = 432,671.76 : x
  2. Step 2: Convert to fraction form
    853,100.64/1,280,438.16 = 432,671.76/x
  3. Step 3: Cross multiply
    853,100.64x = 1,280,438.16 × 432,671.76
  4. Step 4: Simplify right side
    853,100.64x = 554,009,432,258.36
  5. Step 5: Solve for x
    x = 554,009,432,258.36/853,100.64
  6. Step 6: Final answer
    x = 649,406.89

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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.