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Finding the Fourth Proportional to 1,294,931.80, 1,942,397.70 and 980,003.80

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Solution

The fourth proportional to 1,294,931.80, 1,942,397.70 and 980,003.80 is: 1,470,005.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294,931.80 : 1,942,397.70 = 980,003.80 : x
  2. Step 2: Convert to fraction form
    1,294,931.80/1,942,397.70 = 980,003.80/x
  3. Step 3: Cross multiply
    1,294,931.80x = 1,942,397.70 × 980,003.80
  4. Step 4: Simplify right side
    1,294,931.80x = 1,903,557,127,111.26
  5. Step 5: Solve for x
    x = 1,903,557,127,111.26/1,294,931.80
  6. Step 6: Final answer
    x = 1,470,005.70

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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.