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Finding the Fourth Proportional to 553,279.20, 829,918.80 and 520,036.80

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Solution

The fourth proportional to 553,279.20, 829,918.80 and 520,036.80 is: 780,055.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,279.20 : 829,918.80 = 520,036.80 : x
  2. Step 2: Convert to fraction form
    553,279.20/829,918.80 = 520,036.80/x
  3. Step 3: Cross multiply
    553,279.20x = 829,918.80 × 520,036.80
  4. Step 4: Simplify right side
    553,279.20x = 431,588,317,011.84
  5. Step 5: Solve for x
    x = 431,588,317,011.84/553,279.20
  6. Step 6: Final answer
    x = 780,055.20

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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.