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Finding the Fourth Proportional to 561,129.84, 772,728.23 and 487,508.23

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Solution

The fourth proportional to 561,129.84, 772,728.23 and 487,508.23 is: 671,344.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,129.84 : 772,728.23 = 487,508.23 : x
  2. Step 2: Convert to fraction form
    561,129.84/772,728.23 = 487,508.23/x
  3. Step 3: Cross multiply
    561,129.84x = 772,728.23 × 487,508.23
  4. Step 4: Simplify right side
    561,129.84x = 376,711,373,863.01
  5. Step 5: Solve for x
    x = 376,711,373,863.01/561,129.84
  6. Step 6: Final answer
    x = 671,344.40

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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.