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Finding the Fourth Proportional to 821,710.80, 1,234,409.40 and 790,376.40

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Solution

The fourth proportional to 821,710.80, 1,234,409.40 and 790,376.40 is: 1,187,337.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,710.80 : 1,234,409.40 = 790,376.40 : x
  2. Step 2: Convert to fraction form
    821,710.80/1,234,409.40 = 790,376.40/x
  3. Step 3: Cross multiply
    821,710.80x = 1,234,409.40 × 790,376.40
  4. Step 4: Simplify right side
    821,710.80x = 975,648,057,698.16
  5. Step 5: Solve for x
    x = 975,648,057,698.16/821,710.80
  6. Step 6: Final answer
    x = 1,187,337.51

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1.5x scale

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.