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Finding the Fourth Proportional to 573,431.04, 858,274.86 and 421,587.90

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Solution

The fourth proportional to 573,431.04, 858,274.86 and 421,587.90 is: 631,005.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    573,431.04 : 858,274.86 = 421,587.90 : x
  2. Step 2: Convert to fraction form
    573,431.04/858,274.86 = 421,587.90/x
  3. Step 3: Cross multiply
    573,431.04x = 858,274.86 × 421,587.90
  4. Step 4: Simplify right side
    573,431.04x = 361,838,295,850.19
  5. Step 5: Solve for x
    x = 361,838,295,850.19/573,431.04
  6. Step 6: Final answer
    x = 631,005.77

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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.