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Finding the Fourth Proportional to 572,339.40, 858,897.90 and 319,619.40

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Solution

The fourth proportional to 572,339.40, 858,897.90 and 319,619.40 is: 479,646.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,339.40 : 858,897.90 = 319,619.40 : x
  2. Step 2: Convert to fraction form
    572,339.40/858,897.90 = 319,619.40/x
  3. Step 3: Cross multiply
    572,339.40x = 858,897.90 × 319,619.40
  4. Step 4: Simplify right side
    572,339.40x = 274,520,431,459.26
  5. Step 5: Solve for x
    x = 274,520,431,459.26/572,339.40
  6. Step 6: Final answer
    x = 479,646.22

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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.