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Finding the Fourth Proportional to 285,475.95, 428,479.60 and 145,339.47

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Solution

The fourth proportional to 285,475.95, 428,479.60 and 145,339.47 is: 218,144.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,475.95 : 428,479.60 = 145,339.47 : x
  2. Step 2: Convert to fraction form
    285,475.95/428,479.60 = 145,339.47/x
  3. Step 3: Cross multiply
    285,475.95x = 428,479.60 × 145,339.47
  4. Step 4: Simplify right side
    285,475.95x = 62,274,995,827.41
  5. Step 5: Solve for x
    x = 62,274,995,827.41/285,475.95
  6. Step 6: Final answer
    x = 218,144.46

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1.5x scale

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.