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Finding the Fourth Proportional to 1,579.24, 2,368.86 and 553

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Solution

The fourth proportional to 1,579.24, 2,368.86 and 553 is: 829.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,579.24 : 2,368.86 = 553 : x
  2. Step 2: Convert to fraction form
    1,579.24/2,368.86 = 553/x
  3. Step 3: Cross multiply
    1,579.24x = 2,368.86 × 553
  4. Step 4: Simplify right side
    1,579.24x = 1,309,979.58
  5. Step 5: Solve for x
    x = 1,309,979.58/1,579.24
  6. Step 6: Final answer
    x = 829.50

Related Problems

Find fourth proportional to 789.62, 1,184.43 and 276.50
Half scale
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Double scale
Find fourth proportional to 1,580.24, 2,370.36 and 554
Similar ratio
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1.5x scale

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.