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Finding the Fourth Proportional to 560,878.42, 774,080.13 and 319,219.78

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Solution

The fourth proportional to 560,878.42, 774,080.13 and 319,219.78 is: 440,561.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    560,878.42 : 774,080.13 = 319,219.78 : x
  2. Step 2: Convert to fraction form
    560,878.42/774,080.13 = 319,219.78/x
  3. Step 3: Cross multiply
    560,878.42x = 774,080.13 × 319,219.78
  4. Step 4: Simplify right side
    560,878.42x = 247,101,688,800.97
  5. Step 5: Solve for x
    x = 247,101,688,800.97/560,878.42
  6. Step 6: Final answer
    x = 440,561.95

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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.