Home / 781,823.10-1,078,359.69-717,500.07

Finding the Fourth Proportional to 781,823.10, 1,078,359.69 and 717,500.07

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Solution

The fourth proportional to 781,823.10, 1,078,359.69 and 717,500.07 is: 989,639.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,823.10 : 1,078,359.69 = 717,500.07 : x
  2. Step 2: Convert to fraction form
    781,823.10/1,078,359.69 = 717,500.07/x
  3. Step 3: Cross multiply
    781,823.10x = 1,078,359.69 × 717,500.07
  4. Step 4: Simplify right side
    781,823.10x = 773,723,153,060.18
  5. Step 5: Solve for x
    x = 773,723,153,060.18/781,823.10
  6. Step 6: Final answer
    x = 989,639.67

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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.