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Finding the Fourth Proportional to 528,071.90, 792,885.45 and 409,876.70

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Solution

The fourth proportional to 528,071.90, 792,885.45 and 409,876.70 is: 615,418.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,071.90 : 792,885.45 = 409,876.70 : x
  2. Step 2: Convert to fraction form
    528,071.90/792,885.45 = 409,876.70/x
  3. Step 3: Cross multiply
    528,071.90x = 792,885.45 × 409,876.70
  4. Step 4: Simplify right side
    528,071.90x = 324,985,271,724.02
  5. Step 5: Solve for x
    x = 324,985,271,724.02/528,071.90
  6. Step 6: Final answer
    x = 615,418.60

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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.