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Finding the Fourth Proportional to 528,737.90, 729,671.31 and 287,019.95

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Solution

The fourth proportional to 528,737.90, 729,671.31 and 287,019.95 is: 396,094.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,737.90 : 729,671.31 = 287,019.95 : x
  2. Step 2: Convert to fraction form
    528,737.90/729,671.31 = 287,019.95/x
  3. Step 3: Cross multiply
    528,737.90x = 729,671.31 × 287,019.95
  4. Step 4: Simplify right side
    528,737.90x = 209,430,219,264.28
  5. Step 5: Solve for x
    x = 209,430,219,264.28/528,737.90
  6. Step 6: Final answer
    x = 396,094.59

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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.