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Finding the Fourth Proportional to 1,347.95, 1,859.36 and 816.45

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Solution

The fourth proportional to 1,347.95, 1,859.36 and 816.45 is: 1,126.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,347.95 : 1,859.36 = 816.45 : x
  2. Step 2: Convert to fraction form
    1,347.95/1,859.36 = 816.45/x
  3. Step 3: Cross multiply
    1,347.95x = 1,859.36 × 816.45
  4. Step 4: Simplify right side
    1,347.95x = 1,518,070.39
  5. Step 5: Solve for x
    x = 1,518,070.39/1,347.95
  6. Step 6: Final answer
    x = 1,126.21

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1.5x scale

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.