Home / 768,345.60-1,151,827.20-487,718.40

Finding the Fourth Proportional to 768,345.60, 1,151,827.20 and 487,718.40

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Solution

The fourth proportional to 768,345.60, 1,151,827.20 and 487,718.40 is: 731,138.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,345.60 : 1,151,827.20 = 487,718.40 : x
  2. Step 2: Convert to fraction form
    768,345.60/1,151,827.20 = 487,718.40/x
  3. Step 3: Cross multiply
    768,345.60x = 1,151,827.20 × 487,718.40
  4. Step 4: Simplify right side
    768,345.60x = 561,767,319,060.48
  5. Step 5: Solve for x
    x = 561,767,319,060.48/768,345.60
  6. Step 6: Final answer
    x = 731,138.85

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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.