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Finding the Fourth Proportional to 1,503.24, 2,074.36 and 840.07

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Solution

The fourth proportional to 1,503.24, 2,074.36 and 840.07 is: 1,159.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,503.24 : 2,074.36 = 840.07 : x
  2. Step 2: Convert to fraction form
    1,503.24/2,074.36 = 840.07/x
  3. Step 3: Cross multiply
    1,503.24x = 2,074.36 × 840.07
  4. Step 4: Simplify right side
    1,503.24x = 1,742,607.61
  5. Step 5: Solve for x
    x = 1,742,607.61/1,503.24
  6. Step 6: Final answer
    x = 1,159.23

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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.