Home / 810,827.70-1,216,241.55-390,146.10

Finding the Fourth Proportional to 810,827.70, 1,216,241.55 and 390,146.10

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Solution

The fourth proportional to 810,827.70, 1,216,241.55 and 390,146.10 is: 585,219.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,827.70 : 1,216,241.55 = 390,146.10 : x
  2. Step 2: Convert to fraction form
    810,827.70/1,216,241.55 = 390,146.10/x
  3. Step 3: Cross multiply
    810,827.70x = 1,216,241.55 × 390,146.10
  4. Step 4: Simplify right side
    810,827.70x = 474,511,897,390.46
  5. Step 5: Solve for x
    x = 474,511,897,390.46/810,827.70
  6. Step 6: Final answer
    x = 585,219.15

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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.