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Finding the Fourth Proportional to 515,437.30, 772,970.70 and 178,386.52

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Solution

The fourth proportional to 515,437.30, 772,970.70 and 178,386.52 is: 267,515.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,437.30 : 772,970.70 = 178,386.52 : x
  2. Step 2: Convert to fraction form
    515,437.30/772,970.70 = 178,386.52/x
  3. Step 3: Cross multiply
    515,437.30x = 772,970.70 × 178,386.52
  4. Step 4: Simplify right side
    515,437.30x = 137,887,553,234.96
  5. Step 5: Solve for x
    x = 137,887,553,234.96/515,437.30
  6. Step 6: Final answer
    x = 267,515.67

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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.