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Finding the Fourth Proportional to 768,124.80, 1,152,187.20 and 487,958.40

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Solution

The fourth proportional to 768,124.80, 1,152,187.20 and 487,958.40 is: 731,937.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,124.80 : 1,152,187.20 = 487,958.40 : x
  2. Step 2: Convert to fraction form
    768,124.80/1,152,187.20 = 487,958.40/x
  3. Step 3: Cross multiply
    768,124.80x = 1,152,187.20 × 487,958.40
  4. Step 4: Simplify right side
    768,124.80x = 562,219,422,612.48
  5. Step 5: Solve for x
    x = 562,219,422,612.48/768,124.80
  6. Step 6: Final answer
    x = 731,937.60

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1.5x scale

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.