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Finding the Fourth Proportional to 528,734.16, 729,658.44 and 287,018.64

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Solution

The fourth proportional to 528,734.16, 729,658.44 and 287,018.64 is: 396,088.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,734.16 : 729,658.44 = 287,018.64 : x
  2. Step 2: Convert to fraction form
    528,734.16/729,658.44 = 287,018.64/x
  3. Step 3: Cross multiply
    528,734.16x = 729,658.44 × 287,018.64
  4. Step 4: Simplify right side
    528,734.16x = 209,425,573,113.32
  5. Step 5: Solve for x
    x = 209,425,573,113.32/528,734.16
  6. Step 6: Final answer
    x = 396,088.60

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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.