Home / 930,920.78-1,284,671.88-528,512.78

Finding the Fourth Proportional to 930,920.78, 1,284,671.88 and 528,512.78

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Solution

The fourth proportional to 930,920.78, 1,284,671.88 and 528,512.78 is: 729,348.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    930,920.78 : 1,284,671.88 = 528,512.78 : x
  2. Step 2: Convert to fraction form
    930,920.78/1,284,671.88 = 528,512.78/x
  3. Step 3: Cross multiply
    930,920.78x = 1,284,671.88 × 528,512.78
  4. Step 4: Simplify right side
    930,920.78x = 678,965,506,686.63
  5. Step 5: Solve for x
    x = 678,965,506,686.63/930,920.78
  6. Step 6: Final answer
    x = 729,348.32

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Why These Related Problems?

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