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Finding the Fourth Proportional to 1,129.04, 1,558.08 and 624.86

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Solution

The fourth proportional to 1,129.04, 1,558.08 and 624.86 is: 862.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,129.04 : 1,558.08 = 624.86 : x
  2. Step 2: Convert to fraction form
    1,129.04/1,558.08 = 624.86/x
  3. Step 3: Cross multiply
    1,129.04x = 1,558.08 × 624.86
  4. Step 4: Simplify right side
    1,129.04x = 973,579.92
  5. Step 5: Solve for x
    x = 973,579.92/1,129.04
  6. Step 6: Final answer
    x = 862.31

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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.