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Finding the Fourth Proportional to 518,412, 777,618 and 124,428

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Solution

The fourth proportional to 518,412, 777,618 and 124,428 is: 186,642

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,412 : 777,618 = 124,428 : x
  2. Step 2: Convert to fraction form
    518,412/777,618 = 124,428/x
  3. Step 3: Cross multiply
    518,412x = 777,618 × 124,428
  4. Step 4: Simplify right side
    518,412x = 96,757,452,504
  5. Step 5: Solve for x
    x = 96,757,452,504/518,412
  6. Step 6: Final answer
    x = 186,642

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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.