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Finding the Fourth Proportional to 528,712.68, 729,603.72 and 286,990.04

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Solution

The fourth proportional to 528,712.68, 729,603.72 and 286,990.04 is: 396,035.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,712.68 : 729,603.72 = 286,990.04 : x
  2. Step 2: Convert to fraction form
    528,712.68/729,603.72 = 286,990.04/x
  3. Step 3: Cross multiply
    528,712.68x = 729,603.72 × 286,990.04
  4. Step 4: Simplify right side
    528,712.68x = 209,389,000,786.95
  5. Step 5: Solve for x
    x = 209,389,000,786.95/528,712.68
  6. Step 6: Final answer
    x = 396,035.52

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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.