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Finding the Fourth Proportional to 528,078.40, 792,895.20 and 409,883.20

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Solution

The fourth proportional to 528,078.40, 792,895.20 and 409,883.20 is: 615,428.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,078.40 : 792,895.20 = 409,883.20 : x
  2. Step 2: Convert to fraction form
    528,078.40/792,895.20 = 409,883.20/x
  3. Step 3: Cross multiply
    528,078.40x = 792,895.20 × 409,883.20
  4. Step 4: Simplify right side
    528,078.40x = 324,994,421,840.64
  5. Step 5: Solve for x
    x = 324,994,421,840.64/528,078.40
  6. Step 6: Final answer
    x = 615,428.36

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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.