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Finding the Fourth Proportional to 783,689.72, 1,080,490.64 and 507,559.71

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Solution

The fourth proportional to 783,689.72, 1,080,490.64 and 507,559.71 is: 699,783.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    783,689.72 : 1,080,490.64 = 507,559.71 : x
  2. Step 2: Convert to fraction form
    783,689.72/1,080,490.64 = 507,559.71/x
  3. Step 3: Cross multiply
    783,689.72x = 1,080,490.64 × 507,559.71
  4. Step 4: Simplify right side
    783,689.72x = 548,413,517,165.01
  5. Step 5: Solve for x
    x = 548,413,517,165.01/783,689.72
  6. Step 6: Final answer
    x = 699,783.99

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Double scale
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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.