Home / 715,459.48-987,118.76-428,875

Finding the Fourth Proportional to 715,459.48, 987,118.76 and 428,875

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Solution

The fourth proportional to 715,459.48, 987,118.76 and 428,875 is: 591,718.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,459.48 : 987,118.76 = 428,875 : x
  2. Step 2: Convert to fraction form
    715,459.48/987,118.76 = 428,875/x
  3. Step 3: Cross multiply
    715,459.48x = 987,118.76 × 428,875
  4. Step 4: Simplify right side
    715,459.48x = 423,350,558,195
  5. Step 5: Solve for x
    x = 423,350,558,195/715,459.48
  6. Step 6: Final answer
    x = 591,718.43

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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.