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Finding the Fourth Proportional to 528,690.42, 729,593.46 and 286,972.98

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Solution

The fourth proportional to 528,690.42, 729,593.46 and 286,972.98 is: 396,023.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,690.42 : 729,593.46 = 286,972.98 : x
  2. Step 2: Convert to fraction form
    528,690.42/729,593.46 = 286,972.98/x
  3. Step 3: Cross multiply
    528,690.42x = 729,593.46 × 286,972.98
  4. Step 4: Simplify right side
    528,690.42x = 209,373,609,404.71
  5. Step 5: Solve for x
    x = 209,373,609,404.71/528,690.42
  6. Step 6: Final answer
    x = 396,023.08

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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.