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Finding the Fourth Proportional to 385,112.34, 577,681.69 and 132,390.67

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Solution

The fourth proportional to 385,112.34, 577,681.69 and 132,390.67 is: 198,590.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,112.34 : 577,681.69 = 132,390.67 : x
  2. Step 2: Convert to fraction form
    385,112.34/577,681.69 = 132,390.67/x
  3. Step 3: Cross multiply
    385,112.34x = 577,681.69 × 132,390.67
  4. Step 4: Simplify right side
    385,112.34x = 76,479,665,985.83
  5. Step 5: Solve for x
    x = 76,479,665,985.83/385,112.34
  6. Step 6: Final answer
    x = 198,590.54

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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.