Home / 853,656.21-1,280,623.28-398,702.40

Finding the Fourth Proportional to 853,656.21, 1,280,623.28 and 398,702.40

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Solution

The fourth proportional to 853,656.21, 1,280,623.28 and 398,702.40 is: 598,118.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    853,656.21 : 1,280,623.28 = 398,702.40 : x
  2. Step 2: Convert to fraction form
    853,656.21/1,280,623.28 = 398,702.40/x
  3. Step 3: Cross multiply
    853,656.21x = 1,280,623.28 × 398,702.40
  4. Step 4: Simplify right side
    853,656.21x = 510,587,575,231.87
  5. Step 5: Solve for x
    x = 510,587,575,231.87/853,656.21
  6. Step 6: Final answer
    x = 598,118.50

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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.