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Finding the Fourth Proportional to 561,131.63, 772,730.69 and 487,510.02

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Solution

The fourth proportional to 561,131.63, 772,730.69 and 487,510.02 is: 671,346.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,131.63 : 772,730.69 = 487,510.02 : x
  2. Step 2: Convert to fraction form
    561,131.63/772,730.69 = 487,510.02/x
  3. Step 3: Cross multiply
    561,131.63x = 772,730.69 × 487,510.02
  4. Step 4: Simplify right side
    561,131.63x = 376,713,951,698.96
  5. Step 5: Solve for x
    x = 376,713,951,698.96/561,131.63
  6. Step 6: Final answer
    x = 671,346.86

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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.