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Finding the Fourth Proportional to 531,085.80, 732,889.20 and 289,370.34

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Solution

The fourth proportional to 531,085.80, 732,889.20 and 289,370.34 is: 399,326.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    531,085.80 : 732,889.20 = 289,370.34 : x
  2. Step 2: Convert to fraction form
    531,085.80/732,889.20 = 289,370.34/x
  3. Step 3: Cross multiply
    531,085.80x = 732,889.20 × 289,370.34
  4. Step 4: Simplify right side
    531,085.80x = 212,076,396,986.33
  5. Step 5: Solve for x
    x = 212,076,396,986.33/531,085.80
  6. Step 6: Final answer
    x = 399,326.05

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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.