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Finding the Fourth Proportional to 391,058.40, 539,904.36 and 300,233.52

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Solution

The fourth proportional to 391,058.40, 539,904.36 and 300,233.52 is: 414,509.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,058.40 : 539,904.36 = 300,233.52 : x
  2. Step 2: Convert to fraction form
    391,058.40/539,904.36 = 300,233.52/x
  3. Step 3: Cross multiply
    391,058.40x = 539,904.36 × 300,233.52
  4. Step 4: Simplify right side
    391,058.40x = 162,097,386,466.15
  5. Step 5: Solve for x
    x = 162,097,386,466.15/391,058.40
  6. Step 6: Final answer
    x = 414,509.41

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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.