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Finding the Fourth Proportional to 528,817.34, 729,767.93 and 287,099.93

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Solution

The fourth proportional to 528,817.34, 729,767.93 and 287,099.93 is: 396,197.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,817.34 : 729,767.93 = 287,099.93 : x
  2. Step 2: Convert to fraction form
    528,817.34/729,767.93 = 287,099.93/x
  3. Step 3: Cross multiply
    528,817.34x = 729,767.93 × 287,099.93
  4. Step 4: Simplify right side
    528,817.34x = 209,516,316,534.91
  5. Step 5: Solve for x
    x = 209,516,316,534.91/528,817.34
  6. Step 6: Final answer
    x = 396,197.90

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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.