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Finding the Fourth Proportional to 619.74, 924.80 and 554.01

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Solution

The fourth proportional to 619.74, 924.80 and 554.01 is: 826.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.74 : 924.80 = 554.01 : x
  2. Step 2: Convert to fraction form
    619.74/924.80 = 554.01/x
  3. Step 3: Cross multiply
    619.74x = 924.80 × 554.01
  4. Step 4: Simplify right side
    619.74x = 512,349.83
  5. Step 5: Solve for x
    x = 512,349.83/619.74
  6. Step 6: Final answer
    x = 826.72

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.