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Finding the Fourth Proportional to 661,280.76, 912,578.00 and 374,794.70

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Solution

The fourth proportional to 661,280.76, 912,578.00 and 374,794.70 is: 517,222.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,280.76 : 912,578.00 = 374,794.70 : x
  2. Step 2: Convert to fraction form
    661,280.76/912,578.00 = 374,794.70/x
  3. Step 3: Cross multiply
    661,280.76x = 912,578.00 × 374,794.70
  4. Step 4: Simplify right side
    661,280.76x = 342,029,391,299.74
  5. Step 5: Solve for x
    x = 342,029,391,299.74/661,280.76
  6. Step 6: Final answer
    x = 517,222.66

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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.