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Finding the Fourth Proportional to 528,652.90, 729,521.46 and 286,930.30

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Solution

The fourth proportional to 528,652.90, 729,521.46 and 286,930.30 is: 395,953.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,652.90 : 729,521.46 = 286,930.30 : x
  2. Step 2: Convert to fraction form
    528,652.90/729,521.46 = 286,930.30/x
  3. Step 3: Cross multiply
    528,652.90x = 729,521.46 × 286,930.30
  4. Step 4: Simplify right side
    528,652.90x = 209,321,811,725.28
  5. Step 5: Solve for x
    x = 209,321,811,725.28/528,652.90
  6. Step 6: Final answer
    x = 395,953.21

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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.