Home / 705,821.35-974,030.07-399,897.12

Finding the Fourth Proportional to 705,821.35, 974,030.07 and 399,897.12

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Solution

The fourth proportional to 705,821.35, 974,030.07 and 399,897.12 is: 551,856.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    705,821.35 : 974,030.07 = 399,897.12 : x
  2. Step 2: Convert to fraction form
    705,821.35/974,030.07 = 399,897.12/x
  3. Step 3: Cross multiply
    705,821.35x = 974,030.07 × 399,897.12
  4. Step 4: Simplify right side
    705,821.35x = 389,511,819,786.40
  5. Step 5: Solve for x
    x = 389,511,819,786.40/705,821.35
  6. Step 6: Final answer
    x = 551,856.10

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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.