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Finding the Fourth Proportional to 528,665.81, 729,559.55 and 286,948.43

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Solution

The fourth proportional to 528,665.81, 729,559.55 and 286,948.43 is: 395,989.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,665.81 : 729,559.55 = 286,948.43 : x
  2. Step 2: Convert to fraction form
    528,665.81/729,559.55 = 286,948.43/x
  3. Step 3: Cross multiply
    528,665.81x = 729,559.55 × 286,948.43
  4. Step 4: Simplify right side
    528,665.81x = 209,345,970,005.28
  5. Step 5: Solve for x
    x = 209,345,970,005.28/528,665.81
  6. Step 6: Final answer
    x = 395,989.23

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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.