Home / 840,734.30-1,261,066.16-391,300.58

Finding the Fourth Proportional to 840,734.30, 1,261,066.16 and 391,300.58

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Solution

The fourth proportional to 840,734.30, 1,261,066.16 and 391,300.58 is: 586,934.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,734.30 : 1,261,066.16 = 391,300.58 : x
  2. Step 2: Convert to fraction form
    840,734.30/1,261,066.16 = 391,300.58/x
  3. Step 3: Cross multiply
    840,734.30x = 1,261,066.16 × 391,300.58
  4. Step 4: Simplify right side
    840,734.30x = 493,455,923,957.29
  5. Step 5: Solve for x
    x = 493,455,923,957.29/840,734.30
  6. Step 6: Final answer
    x = 586,934.45

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.