Home / 829,420.89-1,243,390.45-323,864.25

Finding the Fourth Proportional to 829,420.89, 1,243,390.45 and 323,864.25

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Solution

The fourth proportional to 829,420.89, 1,243,390.45 and 323,864.25 is: 485,507.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    829,420.89 : 1,243,390.45 = 323,864.25 : x
  2. Step 2: Convert to fraction form
    829,420.89/1,243,390.45 = 323,864.25/x
  3. Step 3: Cross multiply
    829,420.89x = 1,243,390.45 × 323,864.25
  4. Step 4: Simplify right side
    829,420.89x = 402,689,708,519.80
  5. Step 5: Solve for x
    x = 402,689,708,519.80/829,420.89
  6. Step 6: Final answer
    x = 485,507.08

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Double scale
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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.