Home / 738,390.80-1,107,528.60-289,024.40

Finding the Fourth Proportional to 738,390.80, 1,107,528.60 and 289,024.40

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Solution

The fourth proportional to 738,390.80, 1,107,528.60 and 289,024.40 is: 433,514.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,390.80 : 1,107,528.60 = 289,024.40 : x
  2. Step 2: Convert to fraction form
    738,390.80/1,107,528.60 = 289,024.40/x
  3. Step 3: Cross multiply
    738,390.80x = 1,107,528.60 × 289,024.40
  4. Step 4: Simplify right side
    738,390.80x = 320,102,789,097.84
  5. Step 5: Solve for x
    x = 320,102,789,097.84/738,390.80
  6. Step 6: Final answer
    x = 433,514.05

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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.