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Finding the Fourth Proportional to 675,287.61, 931,926.75 and 388,899.96

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Solution

The fourth proportional to 675,287.61, 931,926.75 and 388,899.96 is: 536,699.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,287.61 : 931,926.75 = 388,899.96 : x
  2. Step 2: Convert to fraction form
    675,287.61/931,926.75 = 388,899.96/x
  3. Step 3: Cross multiply
    675,287.61x = 931,926.75 × 388,899.96
  4. Step 4: Simplify right side
    675,287.61x = 362,426,275,797.93
  5. Step 5: Solve for x
    x = 362,426,275,797.93/675,287.61
  6. Step 6: Final answer
    x = 536,699.13

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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.