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Finding the Fourth Proportional to 561,130.12, 772,728.63 and 487,508.51

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Solution

The fourth proportional to 561,130.12, 772,728.63 and 487,508.51 is: 671,344.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,130.12 : 772,728.63 = 487,508.51 : x
  2. Step 2: Convert to fraction form
    561,130.12/772,728.63 = 487,508.51/x
  3. Step 3: Cross multiply
    561,130.12x = 772,728.63 × 487,508.51
  4. Step 4: Simplify right side
    561,130.12x = 376,711,783,149.31
  5. Step 5: Solve for x
    x = 376,711,783,149.31/561,130.12
  6. Step 6: Final answer
    x = 671,344.79

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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.