Home / 830,670.30-1,246,005.45-511,805.70

Finding the Fourth Proportional to 830,670.30, 1,246,005.45 and 511,805.70

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Solution

The fourth proportional to 830,670.30, 1,246,005.45 and 511,805.70 is: 767,708.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,670.30 : 1,246,005.45 = 511,805.70 : x
  2. Step 2: Convert to fraction form
    830,670.30/1,246,005.45 = 511,805.70/x
  3. Step 3: Cross multiply
    830,670.30x = 1,246,005.45 × 511,805.70
  4. Step 4: Simplify right side
    830,670.30x = 637,712,691,541.07
  5. Step 5: Solve for x
    x = 637,712,691,541.07/830,670.30
  6. Step 6: Final answer
    x = 767,708.55

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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.