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Finding the Fourth Proportional to 660,491.40, 988,112.70 and 572,719.80

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Solution

The fourth proportional to 660,491.40, 988,112.70 and 572,719.80 is: 856,804.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,491.40 : 988,112.70 = 572,719.80 : x
  2. Step 2: Convert to fraction form
    660,491.40/988,112.70 = 572,719.80/x
  3. Step 3: Cross multiply
    660,491.40x = 988,112.70 × 572,719.80
  4. Step 4: Simplify right side
    660,491.40x = 565,911,707,921.46
  5. Step 5: Solve for x
    x = 565,911,707,921.46/660,491.40
  6. Step 6: Final answer
    x = 856,804.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.