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Finding the Fourth Proportional to 528,590.38, 729,455.10 and 286,872.90

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Solution

The fourth proportional to 528,590.38, 729,455.10 and 286,872.90 is: 395,884.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,590.38 : 729,455.10 = 286,872.90 : x
  2. Step 2: Convert to fraction form
    528,590.38/729,455.10 = 286,872.90/x
  3. Step 3: Cross multiply
    528,590.38x = 729,455.10 × 286,872.90
  4. Step 4: Simplify right side
    528,590.38x = 209,260,899,956.79
  5. Step 5: Solve for x
    x = 209,260,899,956.79/528,590.38
  6. Step 6: Final answer
    x = 395,884.81

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1.5x scale

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.