Home / 738,739.40-1,108,109.10-645,427.40

Finding the Fourth Proportional to 738,739.40, 1,108,109.10 and 645,427.40

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Solution

The fourth proportional to 738,739.40, 1,108,109.10 and 645,427.40 is: 968,141.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,739.40 : 1,108,109.10 = 645,427.40 : x
  2. Step 2: Convert to fraction form
    738,739.40/1,108,109.10 = 645,427.40/x
  3. Step 3: Cross multiply
    738,739.40x = 1,108,109.10 × 645,427.40
  4. Step 4: Simplify right side
    738,739.40x = 715,203,975,329.34
  5. Step 5: Solve for x
    x = 715,203,975,329.34/738,739.40
  6. Step 6: Final answer
    x = 968,141.10

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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.