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Finding the Fourth Proportional to 877,257.80, 1,315,689.86 and 403,488

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Solution

The fourth proportional to 877,257.80, 1,315,689.86 and 403,488 is: 605,141.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    877,257.80 : 1,315,689.86 = 403,488 : x
  2. Step 2: Convert to fraction form
    877,257.80/1,315,689.86 = 403,488/x
  3. Step 3: Cross multiply
    877,257.80x = 1,315,689.86 × 403,488
  4. Step 4: Simplify right side
    877,257.80x = 530,865,070,231.68
  5. Step 5: Solve for x
    x = 530,865,070,231.68/877,257.80
  6. Step 6: Final answer
    x = 605,141.46

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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.