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Finding the Fourth Proportional to 970,339.20, 1,455,703.20 and 813,652.80

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Solution

The fourth proportional to 970,339.20, 1,455,703.20 and 813,652.80 is: 1,220,642.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    970,339.20 : 1,455,703.20 = 813,652.80 : x
  2. Step 2: Convert to fraction form
    970,339.20/1,455,703.20 = 813,652.80/x
  3. Step 3: Cross multiply
    970,339.20x = 1,455,703.20 × 813,652.80
  4. Step 4: Simplify right side
    970,339.20x = 1,184,436,984,648.96
  5. Step 5: Solve for x
    x = 1,184,436,984,648.96/970,339.20
  6. Step 6: Final answer
    x = 1,220,642.21

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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.