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Finding the Fourth Proportional to 768,285.94, 1,060,234.77 and 428,746.90

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Solution

The fourth proportional to 768,285.94, 1,060,234.77 and 428,746.90 is: 591,670.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,285.94 : 1,060,234.77 = 428,746.90 : x
  2. Step 2: Convert to fraction form
    768,285.94/1,060,234.77 = 428,746.90/x
  3. Step 3: Cross multiply
    768,285.94x = 1,060,234.77 × 428,746.90
  4. Step 4: Simplify right side
    768,285.94x = 454,572,370,909.71
  5. Step 5: Solve for x
    x = 454,572,370,909.71/768,285.94
  6. Step 6: Final answer
    x = 591,670.82

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1.5x scale

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.