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Finding the Fourth Proportional to 472,311.60, 651,779.64 and 257,443.44

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Solution

The fourth proportional to 472,311.60, 651,779.64 and 257,443.44 is: 355,266.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,311.60 : 651,779.64 = 257,443.44 : x
  2. Step 2: Convert to fraction form
    472,311.60/651,779.64 = 257,443.44/x
  3. Step 3: Cross multiply
    472,311.60x = 651,779.64 × 257,443.44
  4. Step 4: Simplify right side
    472,311.60x = 167,796,392,643.56
  5. Step 5: Solve for x
    x = 167,796,392,643.56/472,311.60
  6. Step 6: Final answer
    x = 355,266.30

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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.