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Finding the Fourth Proportional to 528,873.40, 792,143.70 and 279,263.80

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Solution

The fourth proportional to 528,873.40, 792,143.70 and 279,263.80 is: 418,279.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,873.40 : 792,143.70 = 279,263.80 : x
  2. Step 2: Convert to fraction form
    528,873.40/792,143.70 = 279,263.80/x
  3. Step 3: Cross multiply
    528,873.40x = 792,143.70 × 279,263.80
  4. Step 4: Simplify right side
    528,873.40x = 221,217,059,808.06
  5. Step 5: Solve for x
    x = 221,217,059,808.06/528,873.40
  6. Step 6: Final answer
    x = 418,279.80

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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.