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Finding the Fourth Proportional to 478,318.69, 660,109.70 and 263,458.69

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Solution

The fourth proportional to 478,318.69, 660,109.70 and 263,458.69 is: 363,589.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,318.69 : 660,109.70 = 263,458.69 : x
  2. Step 2: Convert to fraction form
    478,318.69/660,109.70 = 263,458.69/x
  3. Step 3: Cross multiply
    478,318.69x = 660,109.70 × 263,458.69
  4. Step 4: Simplify right side
    478,318.69x = 173,911,637,809.92
  5. Step 5: Solve for x
    x = 173,911,637,809.92/478,318.69
  6. Step 6: Final answer
    x = 363,589.47

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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.