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Finding the Fourth Proportional to 666,681.12, 920,022.39 and 360,757.51

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Solution

The fourth proportional to 666,681.12, 920,022.39 and 360,757.51 is: 497,846.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,681.12 : 920,022.39 = 360,757.51 : x
  2. Step 2: Convert to fraction form
    666,681.12/920,022.39 = 360,757.51/x
  3. Step 3: Cross multiply
    666,681.12x = 920,022.39 × 360,757.51
  4. Step 4: Simplify right side
    666,681.12x = 331,904,980,156.75
  5. Step 5: Solve for x
    x = 331,904,980,156.75/666,681.12
  6. Step 6: Final answer
    x = 497,846.68

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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.