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Finding the Fourth Proportional to 559,711.10, 772,511.55 and 389,846.81

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Solution

The fourth proportional to 559,711.10, 772,511.55 and 389,846.81 is: 538,065.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,711.10 : 772,511.55 = 389,846.81 : x
  2. Step 2: Convert to fraction form
    559,711.10/772,511.55 = 389,846.81/x
  3. Step 3: Cross multiply
    559,711.10x = 772,511.55 × 389,846.81
  4. Step 4: Simplify right side
    559,711.10x = 301,161,163,925.01
  5. Step 5: Solve for x
    x = 301,161,163,925.01/559,711.10
  6. Step 6: Final answer
    x = 538,065.37

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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.