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Finding the Fourth Proportional to 572,189.40, 858,672.90 and 319,469.40

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Solution

The fourth proportional to 572,189.40, 858,672.90 and 319,469.40 is: 479,421.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,189.40 : 858,672.90 = 319,469.40 : x
  2. Step 2: Convert to fraction form
    572,189.40/858,672.90 = 319,469.40/x
  3. Step 3: Cross multiply
    572,189.40x = 858,672.90 × 319,469.40
  4. Step 4: Simplify right side
    572,189.40x = 274,319,716,159.26
  5. Step 5: Solve for x
    x = 274,319,716,159.26/572,189.40
  6. Step 6: Final answer
    x = 479,421.18

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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.