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Finding the Fourth Proportional to 547,642.40, 820,580.40 and 310,279.20

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Solution

The fourth proportional to 547,642.40, 820,580.40 and 310,279.20 is: 464,918.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,642.40 : 820,580.40 = 310,279.20 : x
  2. Step 2: Convert to fraction form
    547,642.40/820,580.40 = 310,279.20/x
  3. Step 3: Cross multiply
    547,642.40x = 820,580.40 × 310,279.20
  4. Step 4: Simplify right side
    547,642.40x = 254,609,030,047.68
  5. Step 5: Solve for x
    x = 254,609,030,047.68/547,642.40
  6. Step 6: Final answer
    x = 464,918.40

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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.