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Finding the Fourth Proportional to 663,346.76, 915,418.86 and 376,867.40

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Solution

The fourth proportional to 663,346.76, 915,418.86 and 376,867.40 is: 520,077.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,346.76 : 915,418.86 = 376,867.40 : x
  2. Step 2: Convert to fraction form
    663,346.76/915,418.86 = 376,867.40/x
  3. Step 3: Cross multiply
    663,346.76x = 915,418.86 × 376,867.40
  4. Step 4: Simplify right side
    663,346.76x = 344,991,525,679.16
  5. Step 5: Solve for x
    x = 344,991,525,679.16/663,346.76
  6. Step 6: Final answer
    x = 520,077.20

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Double scale
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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.