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Finding the Fourth Proportional to 479,543.95, 661,364.35 and 288,521.65

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Solution

The fourth proportional to 479,543.95, 661,364.35 and 288,521.65 is: 397,915.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,543.95 : 661,364.35 = 288,521.65 : x
  2. Step 2: Convert to fraction form
    479,543.95/661,364.35 = 288,521.65/x
  3. Step 3: Cross multiply
    479,543.95x = 661,364.35 × 288,521.65
  4. Step 4: Simplify right side
    479,543.95x = 190,817,933,513.18
  5. Step 5: Solve for x
    x = 190,817,933,513.18/479,543.95
  6. Step 6: Final answer
    x = 397,915.42

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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.