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Finding the Fourth Proportional to 496,790.70, 745,186.05 and 319,643.70

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Solution

The fourth proportional to 496,790.70, 745,186.05 and 319,643.70 is: 479,465.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    496,790.70 : 745,186.05 = 319,643.70 : x
  2. Step 2: Convert to fraction form
    496,790.70/745,186.05 = 319,643.70/x
  3. Step 3: Cross multiply
    496,790.70x = 745,186.05 × 319,643.70
  4. Step 4: Simplify right side
    496,790.70x = 238,194,026,210.39
  5. Step 5: Solve for x
    x = 238,194,026,210.39/496,790.70
  6. Step 6: Final answer
    x = 479,465.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.