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Finding the Fourth Proportional to 402,505.95, 555,446.45 and 230,418.21

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Solution

The fourth proportional to 402,505.95, 555,446.45 and 230,418.21 is: 317,970.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,505.95 : 555,446.45 = 230,418.21 : x
  2. Step 2: Convert to fraction form
    402,505.95/555,446.45 = 230,418.21/x
  3. Step 3: Cross multiply
    402,505.95x = 555,446.45 × 230,418.21
  4. Step 4: Simplify right side
    402,505.95x = 127,984,975,607.76
  5. Step 5: Solve for x
    x = 127,984,975,607.76/402,505.95
  6. Step 6: Final answer
    x = 317,970.39

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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.