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Finding the Fourth Proportional to 1,353.70, 2,030.55 and 916.30

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Solution

The fourth proportional to 1,353.70, 2,030.55 and 916.30 is: 1,374.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,353.70 : 2,030.55 = 916.30 : x
  2. Step 2: Convert to fraction form
    1,353.70/2,030.55 = 916.30/x
  3. Step 3: Cross multiply
    1,353.70x = 2,030.55 × 916.30
  4. Step 4: Simplify right side
    1,353.70x = 1,860,592.97
  5. Step 5: Solve for x
    x = 1,860,592.97/1,353.70
  6. Step 6: Final answer
    x = 1,374.45

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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.