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Finding the Fourth Proportional to 561,210.40, 774,486.96 and 306,565.76

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Solution

The fourth proportional to 561,210.40, 774,486.96 and 306,565.76 is: 423,069.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,210.40 : 774,486.96 = 306,565.76 : x
  2. Step 2: Convert to fraction form
    561,210.40/774,486.96 = 306,565.76/x
  3. Step 3: Cross multiply
    561,210.40x = 774,486.96 × 306,565.76
  4. Step 4: Simplify right side
    561,210.40x = 237,431,183,502.49
  5. Step 5: Solve for x
    x = 237,431,183,502.49/561,210.40
  6. Step 6: Final answer
    x = 423,069.82

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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.