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Finding the Fourth Proportional to 478,730.16, 660,644.32 and 263,870.40

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Solution

The fourth proportional to 478,730.16, 660,644.32 and 263,870.40 is: 364,139.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,730.16 : 660,644.32 = 263,870.40 : x
  2. Step 2: Convert to fraction form
    478,730.16/660,644.32 = 263,870.40/x
  3. Step 3: Cross multiply
    478,730.16x = 660,644.32 × 263,870.40
  4. Step 4: Simplify right side
    478,730.16x = 174,324,480,976.13
  5. Step 5: Solve for x
    x = 174,324,480,976.13/478,730.16
  6. Step 6: Final answer
    x = 364,139.33

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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.