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Finding the Fourth Proportional to 778,856.72, 1,060,404.08 and 776,457.68

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Solution

The fourth proportional to 778,856.72, 1,060,404.08 and 776,457.68 is: 1,057,137.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,856.72 : 1,060,404.08 = 776,457.68 : x
  2. Step 2: Convert to fraction form
    778,856.72/1,060,404.08 = 776,457.68/x
  3. Step 3: Cross multiply
    778,856.72x = 1,060,404.08 × 776,457.68
  4. Step 4: Simplify right side
    778,856.72x = 823,358,891,819.34
  5. Step 5: Solve for x
    x = 823,358,891,819.34/778,856.72
  6. Step 6: Final answer
    x = 1,057,137.82

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.