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Finding the Fourth Proportional to 515,387.10, 711,210.18 and 285,941.94

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Solution

The fourth proportional to 515,387.10, 711,210.18 and 285,941.94 is: 394,586.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,387.10 : 711,210.18 = 285,941.94 : x
  2. Step 2: Convert to fraction form
    515,387.10/711,210.18 = 285,941.94/x
  3. Step 3: Cross multiply
    515,387.10x = 711,210.18 × 285,941.94
  4. Step 4: Simplify right side
    515,387.10x = 203,364,818,616.95
  5. Step 5: Solve for x
    x = 203,364,818,616.95/515,387.10
  6. Step 6: Final answer
    x = 394,586.55

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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.