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Finding the Fourth Proportional to 660,934.96, 912,079.74 and 388,970.57

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Solution

The fourth proportional to 660,934.96, 912,079.74 and 388,970.57 is: 536,773.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,934.96 : 912,079.74 = 388,970.57 : x
  2. Step 2: Convert to fraction form
    660,934.96/912,079.74 = 388,970.57/x
  3. Step 3: Cross multiply
    660,934.96x = 912,079.74 × 388,970.57
  4. Step 4: Simplify right side
    660,934.96x = 354,772,180,092.09
  5. Step 5: Solve for x
    x = 354,772,180,092.09/660,934.96
  6. Step 6: Final answer
    x = 536,773.21

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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.