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Finding the Fourth Proportional to 1,709,905.70, 2,561,359.35 and 868,931.30

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Solution

The fourth proportional to 1,709,905.70, 2,561,359.35 and 868,931.30 is: 1,301,618.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,709,905.70 : 2,561,359.35 = 868,931.30 : x
  2. Step 2: Convert to fraction form
    1,709,905.70/2,561,359.35 = 868,931.30/x
  3. Step 3: Cross multiply
    1,709,905.70x = 2,561,359.35 × 868,931.30
  4. Step 4: Simplify right side
    1,709,905.70x = 2,225,645,309,762.66
  5. Step 5: Solve for x
    x = 2,225,645,309,762.66/1,709,905.70
  6. Step 6: Final answer
    x = 1,301,618.74

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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.