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Finding the Fourth Proportional to 768,085.60, 1,152,128.40 and 577,314.40

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Solution

The fourth proportional to 768,085.60, 1,152,128.40 and 577,314.40 is: 865,971.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,085.60 : 1,152,128.40 = 577,314.40 : x
  2. Step 2: Convert to fraction form
    768,085.60/1,152,128.40 = 577,314.40/x
  3. Step 3: Cross multiply
    768,085.60x = 1,152,128.40 × 577,314.40
  4. Step 4: Simplify right side
    768,085.60x = 665,140,315,968.96
  5. Step 5: Solve for x
    x = 665,140,315,968.96/768,085.60
  6. Step 6: Final answer
    x = 865,971.60

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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.