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Finding the Fourth Proportional to 672,066.58, 926,828.90 and 490,490.90

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Solution

The fourth proportional to 672,066.58, 926,828.90 and 490,490.90 is: 676,422.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,066.58 : 926,828.90 = 490,490.90 : x
  2. Step 2: Convert to fraction form
    672,066.58/926,828.90 = 490,490.90/x
  3. Step 3: Cross multiply
    672,066.58x = 926,828.90 × 490,490.90
  4. Step 4: Simplify right side
    672,066.58x = 454,601,141,307.01
  5. Step 5: Solve for x
    x = 454,601,141,307.01/672,066.58
  6. Step 6: Final answer
    x = 676,422.78

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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.