Home / 861,720.66-1,188,866.70-498,946.50

Finding the Fourth Proportional to 861,720.66, 1,188,866.70 and 498,946.50

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Solution

The fourth proportional to 861,720.66, 1,188,866.70 and 498,946.50 is: 688,367.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,720.66 : 1,188,866.70 = 498,946.50 : x
  2. Step 2: Convert to fraction form
    861,720.66/1,188,866.70 = 498,946.50/x
  3. Step 3: Cross multiply
    861,720.66x = 1,188,866.70 × 498,946.50
  4. Step 4: Simplify right side
    861,720.66x = 593,180,878,931.55
  5. Step 5: Solve for x
    x = 593,180,878,931.55/861,720.66
  6. Step 6: Final answer
    x = 688,367.94

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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.