Home / 715,426.63-987,294.12-388,742.74

Finding the Fourth Proportional to 715,426.63, 987,294.12 and 388,742.74

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Solution

The fourth proportional to 715,426.63, 987,294.12 and 388,742.74 is: 536,467.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,426.63 : 987,294.12 = 388,742.74 : x
  2. Step 2: Convert to fraction form
    715,426.63/987,294.12 = 388,742.74/x
  3. Step 3: Cross multiply
    715,426.63x = 987,294.12 × 388,742.74
  4. Step 4: Simplify right side
    715,426.63x = 383,803,423,022.20
  5. Step 5: Solve for x
    x = 383,803,423,022.20/715,426.63
  6. Step 6: Final answer
    x = 536,467.90

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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.