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Finding the Fourth Proportional to 819,312.72, 1,130,718.86 and 451,861.72

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Solution

The fourth proportional to 819,312.72, 1,130,718.86 and 451,861.72 is: 623,606.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,312.72 : 1,130,718.86 = 451,861.72 : x
  2. Step 2: Convert to fraction form
    819,312.72/1,130,718.86 = 451,861.72/x
  3. Step 3: Cross multiply
    819,312.72x = 1,130,718.86 × 451,861.72
  4. Step 4: Simplify right side
    819,312.72x = 510,928,568,916.04
  5. Step 5: Solve for x
    x = 510,928,568,916.04/819,312.72
  6. Step 6: Final answer
    x = 623,606.29

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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.