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Finding the Fourth Proportional to 806,420.80, 1,208,594.40 and 490,542.40

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Solution

The fourth proportional to 806,420.80, 1,208,594.40 and 490,542.40 is: 735,182.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    806,420.80 : 1,208,594.40 = 490,542.40 : x
  2. Step 2: Convert to fraction form
    806,420.80/1,208,594.40 = 490,542.40/x
  3. Step 3: Cross multiply
    806,420.80x = 1,208,594.40 × 490,542.40
  4. Step 4: Simplify right side
    806,420.80x = 592,866,797,602.56
  5. Step 5: Solve for x
    x = 592,866,797,602.56/806,420.80
  6. Step 6: Final answer
    x = 735,182.92

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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.