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Finding the Fourth Proportional to 478,639.32, 660,490.98 and 263,779.44

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Solution

The fourth proportional to 478,639.32, 660,490.98 and 263,779.44 is: 363,998.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,639.32 : 660,490.98 = 263,779.44 : x
  2. Step 2: Convert to fraction form
    478,639.32/660,490.98 = 263,779.44/x
  3. Step 3: Cross multiply
    478,639.32x = 660,490.98 × 263,779.44
  4. Step 4: Simplify right side
    478,639.32x = 174,223,940,829.45
  5. Step 5: Solve for x
    x = 174,223,940,829.45/478,639.32
  6. Step 6: Final answer
    x = 363,998.39

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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.