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Finding the Fourth Proportional to 617,555.40, 925,020.90 and 512,579.40

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Solution

The fourth proportional to 617,555.40, 925,020.90 and 512,579.40 is: 767,779.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,555.40 : 925,020.90 = 512,579.40 : x
  2. Step 2: Convert to fraction form
    617,555.40/925,020.90 = 512,579.40/x
  3. Step 3: Cross multiply
    617,555.40x = 925,020.90 × 512,579.40
  4. Step 4: Simplify right side
    617,555.40x = 474,146,657,909.46
  5. Step 5: Solve for x
    x = 474,146,657,909.46/617,555.40
  6. Step 6: Final answer
    x = 767,779.96

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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.