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Finding the Fourth Proportional to 790,624.80, 1,091,062.80 and 428,048.88

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Solution

The fourth proportional to 790,624.80, 1,091,062.80 and 428,048.88 is: 590,707.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    790,624.80 : 1,091,062.80 = 428,048.88 : x
  2. Step 2: Convert to fraction form
    790,624.80/1,091,062.80 = 428,048.88/x
  3. Step 3: Cross multiply
    790,624.80x = 1,091,062.80 × 428,048.88
  4. Step 4: Simplify right side
    790,624.80x = 467,028,209,549.66
  5. Step 5: Solve for x
    x = 467,028,209,549.66/790,624.80
  6. Step 6: Final answer
    x = 590,707.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.