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Finding the Fourth Proportional to 560.68, 841.45 and 388.55

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Solution

The fourth proportional to 560.68, 841.45 and 388.55 is: 583.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.68 : 841.45 = 388.55 : x
  2. Step 2: Convert to fraction form
    560.68/841.45 = 388.55/x
  3. Step 3: Cross multiply
    560.68x = 841.45 × 388.55
  4. Step 4: Simplify right side
    560.68x = 326,945.40
  5. Step 5: Solve for x
    x = 326,945.40/560.68
  6. Step 6: Final answer
    x = 583.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.