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Finding the Fourth Proportional to 705,453.72, 972,992.70 and 490,486.20

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Solution

The fourth proportional to 705,453.72, 972,992.70 and 490,486.20 is: 676,500.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    705,453.72 : 972,992.70 = 490,486.20 : x
  2. Step 2: Convert to fraction form
    705,453.72/972,992.70 = 490,486.20/x
  3. Step 3: Cross multiply
    705,453.72x = 972,992.70 × 490,486.20
  4. Step 4: Simplify right side
    705,453.72x = 477,239,492,050.74
  5. Step 5: Solve for x
    x = 477,239,492,050.74/705,453.72
  6. Step 6: Final answer
    x = 676,500.07

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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.