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Finding the Fourth Proportional to 583,872.80, 875,809.20 and 505,140.80

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Solution

The fourth proportional to 583,872.80, 875,809.20 and 505,140.80 is: 757,711.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    583,872.80 : 875,809.20 = 505,140.80 : x
  2. Step 2: Convert to fraction form
    583,872.80/875,809.20 = 505,140.80/x
  3. Step 3: Cross multiply
    583,872.80x = 875,809.20 × 505,140.80
  4. Step 4: Simplify right side
    583,872.80x = 442,406,959,935.36
  5. Step 5: Solve for x
    x = 442,406,959,935.36/583,872.80
  6. Step 6: Final answer
    x = 757,711.20

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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.