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Finding the Fourth Proportional to 620,820.40, 931,230.60 and 542,088.40

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Solution

The fourth proportional to 620,820.40, 931,230.60 and 542,088.40 is: 813,132.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,820.40 : 931,230.60 = 542,088.40 : x
  2. Step 2: Convert to fraction form
    620,820.40/931,230.60 = 542,088.40/x
  3. Step 3: Cross multiply
    620,820.40x = 931,230.60 × 542,088.40
  4. Step 4: Simplify right side
    620,820.40x = 504,809,305,985.04
  5. Step 5: Solve for x
    x = 504,809,305,985.04/620,820.40
  6. Step 6: Final answer
    x = 813,132.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.