Home / 687,421.51-1,031,071.68-308,240.47

Finding the Fourth Proportional to 687,421.51, 1,031,071.68 and 308,240.47

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Solution

The fourth proportional to 687,421.51, 1,031,071.68 and 308,240.47 is: 462,333.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,421.51 : 1,031,071.68 = 308,240.47 : x
  2. Step 2: Convert to fraction form
    687,421.51/1,031,071.68 = 308,240.47/x
  3. Step 3: Cross multiply
    687,421.51x = 1,031,071.68 × 308,240.47
  4. Step 4: Simplify right side
    687,421.51x = 317,818,020,535.73
  5. Step 5: Solve for x
    x = 317,818,020,535.73/687,421.51
  6. Step 6: Final answer
    x = 462,333.54

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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.