Home / 919,301.76-1,378,952.64-288,266.40

Finding the Fourth Proportional to 919,301.76, 1,378,952.64 and 288,266.40

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Solution

The fourth proportional to 919,301.76, 1,378,952.64 and 288,266.40 is: 432,399.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,301.76 : 1,378,952.64 = 288,266.40 : x
  2. Step 2: Convert to fraction form
    919,301.76/1,378,952.64 = 288,266.40/x
  3. Step 3: Cross multiply
    919,301.76x = 1,378,952.64 × 288,266.40
  4. Step 4: Simplify right side
    919,301.76x = 397,505,713,303.30
  5. Step 5: Solve for x
    x = 397,505,713,303.30/919,301.76
  6. Step 6: Final answer
    x = 432,399.60

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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.