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Finding the Fourth Proportional to 561,117.75, 772,711.57 and 487,496.15

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Solution

The fourth proportional to 561,117.75, 772,711.57 and 487,496.15 is: 671,327.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,117.75 : 772,711.57 = 487,496.15 : x
  2. Step 2: Convert to fraction form
    561,117.75/772,711.57 = 487,496.15/x
  3. Step 3: Cross multiply
    561,117.75x = 772,711.57 × 487,496.15
  4. Step 4: Simplify right side
    561,117.75x = 376,693,914,276.77
  5. Step 5: Solve for x
    x = 376,693,914,276.77/561,117.75
  6. Step 6: Final answer
    x = 671,327.74

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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.