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Finding the Fourth Proportional to 778,920.80, 1,074,658.80 and 434,700.80

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Solution

The fourth proportional to 778,920.80, 1,074,658.80 and 434,700.80 is: 599,746.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,920.80 : 1,074,658.80 = 434,700.80 : x
  2. Step 2: Convert to fraction form
    778,920.80/1,074,658.80 = 434,700.80/x
  3. Step 3: Cross multiply
    778,920.80x = 1,074,658.80 × 434,700.80
  4. Step 4: Simplify right side
    778,920.80x = 467,155,040,087.04
  5. Step 5: Solve for x
    x = 467,155,040,087.04/778,920.80
  6. Step 6: Final answer
    x = 599,746.52

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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.