Home / 430,917.40-646,376.10-389,583.10

Finding the Fourth Proportional to 430,917.40, 646,376.10 and 389,583.10

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Solution

The fourth proportional to 430,917.40, 646,376.10 and 389,583.10 is: 584,374.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,917.40 : 646,376.10 = 389,583.10 : x
  2. Step 2: Convert to fraction form
    430,917.40/646,376.10 = 389,583.10/x
  3. Step 3: Cross multiply
    430,917.40x = 646,376.10 × 389,583.10
  4. Step 4: Simplify right side
    430,917.40x = 251,817,204,803.91
  5. Step 5: Solve for x
    x = 251,817,204,803.91/430,917.40
  6. Step 6: Final answer
    x = 584,374.65

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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.