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Finding the Fourth Proportional to 715,980.68, 987,807.47 and 443,950.68

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Solution

The fourth proportional to 715,980.68, 987,807.47 and 443,950.68 is: 612,499.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,980.68 : 987,807.47 = 443,950.68 : x
  2. Step 2: Convert to fraction form
    715,980.68/987,807.47 = 443,950.68/x
  3. Step 3: Cross multiply
    715,980.68x = 987,807.47 × 443,950.68
  4. Step 4: Simplify right side
    715,980.68x = 438,537,799,125.46
  5. Step 5: Solve for x
    x = 438,537,799,125.46/715,980.68
  6. Step 6: Final answer
    x = 612,499.49

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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.