Home / 663,869.49-916,135.71-377,389.59

Finding the Fourth Proportional to 663,869.49, 916,135.71 and 377,389.59

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Solution

The fourth proportional to 663,869.49, 916,135.71 and 377,389.59 is: 520,795.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,869.49 : 916,135.71 = 377,389.59 : x
  2. Step 2: Convert to fraction form
    663,869.49/916,135.71 = 377,389.59/x
  3. Step 3: Cross multiply
    663,869.49x = 916,135.71 × 377,389.59
  4. Step 4: Simplify right side
    663,869.49x = 345,740,079,981.26
  5. Step 5: Solve for x
    x = 345,740,079,981.26/663,869.49
  6. Step 6: Final answer
    x = 520,795.25

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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.