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Finding the Fourth Proportional to 528,682.91, 727,738.55 and 456,315.40

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Solution

The fourth proportional to 528,682.91, 727,738.55 and 456,315.40 is: 628,123.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,682.91 : 727,738.55 = 456,315.40 : x
  2. Step 2: Convert to fraction form
    528,682.91/727,738.55 = 456,315.40/x
  3. Step 3: Cross multiply
    528,682.91x = 727,738.55 × 456,315.40
  4. Step 4: Simplify right side
    528,682.91x = 332,078,305,148.93
  5. Step 5: Solve for x
    x = 332,078,305,148.93/528,682.91
  6. Step 6: Final answer
    x = 628,123.77

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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.