Home / 1,346.32-1,856.40-972.64

Finding the Fourth Proportional to 1,346.32, 1,856.40 and 972.64

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Solution

The fourth proportional to 1,346.32, 1,856.40 and 972.64 is: 1,341.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,346.32 : 1,856.40 = 972.64 : x
  2. Step 2: Convert to fraction form
    1,346.32/1,856.40 = 972.64/x
  3. Step 3: Cross multiply
    1,346.32x = 1,856.40 × 972.64
  4. Step 4: Simplify right side
    1,346.32x = 1,805,608.90
  5. Step 5: Solve for x
    x = 1,805,608.90/1,346.32
  6. Step 6: Final answer
    x = 1,341.14

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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.