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Finding the Fourth Proportional to 620,860.60, 931,290.90 and 573,621.40

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Solution

The fourth proportional to 620,860.60, 931,290.90 and 573,621.40 is: 860,432.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,860.60 : 931,290.90 = 573,621.40 : x
  2. Step 2: Convert to fraction form
    620,860.60/931,290.90 = 573,621.40/x
  3. Step 3: Cross multiply
    620,860.60x = 931,290.90 × 573,621.40
  4. Step 4: Simplify right side
    620,860.60x = 534,208,389,865.26
  5. Step 5: Solve for x
    x = 534,208,389,865.26/620,860.60
  6. Step 6: Final answer
    x = 860,432.10

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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.