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Finding the Fourth Proportional to 1,374.99, 1,897.50 and 785.50

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Solution

The fourth proportional to 1,374.99, 1,897.50 and 785.50 is: 1,084.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,374.99 : 1,897.50 = 785.50 : x
  2. Step 2: Convert to fraction form
    1,374.99/1,897.50 = 785.50/x
  3. Step 3: Cross multiply
    1,374.99x = 1,897.50 × 785.50
  4. Step 4: Simplify right side
    1,374.99x = 1,490,486.25
  5. Step 5: Solve for x
    x = 1,490,486.25/1,374.99
  6. Step 6: Final answer
    x = 1,084.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.