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Finding the Fourth Proportional to 680,856.70, 1,021,285.05 and 470,904.70

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Solution

The fourth proportional to 680,856.70, 1,021,285.05 and 470,904.70 is: 706,357.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,856.70 : 1,021,285.05 = 470,904.70 : x
  2. Step 2: Convert to fraction form
    680,856.70/1,021,285.05 = 470,904.70/x
  3. Step 3: Cross multiply
    680,856.70x = 1,021,285.05 × 470,904.70
  4. Step 4: Simplify right side
    680,856.70x = 480,927,930,084.74
  5. Step 5: Solve for x
    x = 480,927,930,084.74/680,856.70
  6. Step 6: Final answer
    x = 706,357.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.