Home / 783,087.30-1,174,630.95-428,793.30

Finding the Fourth Proportional to 783,087.30, 1,174,630.95 and 428,793.30

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Solution

The fourth proportional to 783,087.30, 1,174,630.95 and 428,793.30 is: 643,189.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    783,087.30 : 1,174,630.95 = 428,793.30 : x
  2. Step 2: Convert to fraction form
    783,087.30/1,174,630.95 = 428,793.30/x
  3. Step 3: Cross multiply
    783,087.30x = 1,174,630.95 × 428,793.30
  4. Step 4: Simplify right side
    783,087.30x = 503,673,881,332.64
  5. Step 5: Solve for x
    x = 503,673,881,332.64/783,087.30
  6. Step 6: Final answer
    x = 643,189.95

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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.