Home / 1,238,228.29-1,708,031.09-778,615.45

Finding the Fourth Proportional to 1,238,228.29, 1,708,031.09 and 778,615.45

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Solution

The fourth proportional to 1,238,228.29, 1,708,031.09 and 778,615.45 is: 1,074,034.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238,228.29 : 1,708,031.09 = 778,615.45 : x
  2. Step 2: Convert to fraction form
    1,238,228.29/1,708,031.09 = 778,615.45/x
  3. Step 3: Cross multiply
    1,238,228.29x = 1,708,031.09 × 778,615.45
  4. Step 4: Simplify right side
    1,238,228.29x = 1,329,899,391,861.26
  5. Step 5: Solve for x
    x = 1,329,899,391,861.26/1,238,228.29
  6. Step 6: Final answer
    x = 1,074,034.09

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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.