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Finding the Fourth Proportional to 528,994.40, 730,017.16 and 287,279.06

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Solution

The fourth proportional to 528,994.40, 730,017.16 and 287,279.06 is: 396,447.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,994.40 : 730,017.16 = 287,279.06 : x
  2. Step 2: Convert to fraction form
    528,994.40/730,017.16 = 287,279.06/x
  3. Step 3: Cross multiply
    528,994.40x = 730,017.16 × 287,279.06
  4. Step 4: Simplify right side
    528,994.40x = 209,718,639,140.39
  5. Step 5: Solve for x
    x = 209,718,639,140.39/528,994.40
  6. Step 6: Final answer
    x = 396,447.75

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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.