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Finding the Fourth Proportional to 520,053.80, 780,080.70 and 440,337.65

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Solution

The fourth proportional to 520,053.80, 780,080.70 and 440,337.65 is: 660,506.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,053.80 : 780,080.70 = 440,337.65 : x
  2. Step 2: Convert to fraction form
    520,053.80/780,080.70 = 440,337.65/x
  3. Step 3: Cross multiply
    520,053.80x = 780,080.70 × 440,337.65
  4. Step 4: Simplify right side
    520,053.80x = 343,498,902,248.36
  5. Step 5: Solve for x
    x = 343,498,902,248.36/520,053.80
  6. Step 6: Final answer
    x = 660,506.48

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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.