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Finding the Fourth Proportional to 528,626.74, 729,505.61 and 286,909.31

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Solution

The fourth proportional to 528,626.74, 729,505.61 and 286,909.31 is: 395,935.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,626.74 : 729,505.61 = 286,909.31 : x
  2. Step 2: Convert to fraction form
    528,626.74/729,505.61 = 286,909.31/x
  3. Step 3: Cross multiply
    528,626.74x = 729,505.61 × 286,909.31
  4. Step 4: Simplify right side
    528,626.74x = 209,301,951,206.23
  5. Step 5: Solve for x
    x = 209,301,951,206.23/528,626.74
  6. Step 6: Final answer
    x = 395,935.23

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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.