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Finding the Fourth Proportional to 675,302.55, 931,997.90 and 388,878.45

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Solution

The fourth proportional to 675,302.55, 931,997.90 and 388,878.45 is: 536,698.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,302.55 : 931,997.90 = 388,878.45 : x
  2. Step 2: Convert to fraction form
    675,302.55/931,997.90 = 388,878.45/x
  3. Step 3: Cross multiply
    675,302.55x = 931,997.90 × 388,878.45
  4. Step 4: Simplify right side
    675,302.55x = 362,433,896,810.86
  5. Step 5: Solve for x
    x = 362,433,896,810.86/675,302.55
  6. Step 6: Final answer
    x = 536,698.55

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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.