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Finding the Fourth Proportional to 1,270.57, 1,905.98 and 530.03

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Solution

The fourth proportional to 1,270.57, 1,905.98 and 530.03 is: 795.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,270.57 : 1,905.98 = 530.03 : x
  2. Step 2: Convert to fraction form
    1,270.57/1,905.98 = 530.03/x
  3. Step 3: Cross multiply
    1,270.57x = 1,905.98 × 530.03
  4. Step 4: Simplify right side
    1,270.57x = 1,010,226.58
  5. Step 5: Solve for x
    x = 1,010,226.58/1,270.57
  6. Step 6: Final answer
    x = 795.10

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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.