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Finding the Fourth Proportional to 867,071.55, 1,300,492.50 and 393,648.03

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Solution

The fourth proportional to 867,071.55, 1,300,492.50 and 393,648.03 is: 590,419.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,071.55 : 1,300,492.50 = 393,648.03 : x
  2. Step 2: Convert to fraction form
    867,071.55/1,300,492.50 = 393,648.03/x
  3. Step 3: Cross multiply
    867,071.55x = 1,300,492.50 × 393,648.03
  4. Step 4: Simplify right side
    867,071.55x = 511,936,310,654.78
  5. Step 5: Solve for x
    x = 511,936,310,654.78/867,071.55
  6. Step 6: Final answer
    x = 590,419.91

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1.5x scale

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.