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Finding the Fourth Proportional to 528,626.25, 729,504.92 and 286,908.81

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Solution

The fourth proportional to 528,626.25, 729,504.92 and 286,908.81 is: 395,934.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,626.25 : 729,504.92 = 286,908.81 : x
  2. Step 2: Convert to fraction form
    528,626.25/729,504.92 = 286,908.81/x
  3. Step 3: Cross multiply
    528,626.25x = 729,504.92 × 286,908.81
  4. Step 4: Simplify right side
    528,626.25x = 209,301,387,051.80
  5. Step 5: Solve for x
    x = 209,301,387,051.80/528,626.25
  6. Step 6: Final answer
    x = 395,934.54

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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.