Home / 715,394.36-987,320.14-428,941.10

Finding the Fourth Proportional to 715,394.36, 987,320.14 and 428,941.10

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Solution

The fourth proportional to 715,394.36, 987,320.14 and 428,941.10 is: 591,984.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,394.36 : 987,320.14 = 428,941.10 : x
  2. Step 2: Convert to fraction form
    715,394.36/987,320.14 = 428,941.10/x
  3. Step 3: Cross multiply
    715,394.36x = 987,320.14 × 428,941.10
  4. Step 4: Simplify right side
    715,394.36x = 423,502,186,903.75
  5. Step 5: Solve for x
    x = 423,502,186,903.75/715,394.36
  6. Step 6: Final answer
    x = 591,984.24

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1.5x scale

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.