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Finding the Fourth Proportional to 528,369.30, 729,149.04 and 286,651.80

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Solution

The fourth proportional to 528,369.30, 729,149.04 and 286,651.80 is: 395,579.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,369.30 : 729,149.04 = 286,651.80 : x
  2. Step 2: Convert to fraction form
    528,369.30/729,149.04 = 286,651.80/x
  3. Step 3: Cross multiply
    528,369.30x = 729,149.04 × 286,651.80
  4. Step 4: Simplify right side
    528,369.30x = 209,011,884,784.27
  5. Step 5: Solve for x
    x = 209,011,884,784.27/528,369.30
  6. Step 6: Final answer
    x = 395,579.16

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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.