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Finding the Fourth Proportional to 807,412.20, 1,209,368.70 and 667,444.20

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Solution

The fourth proportional to 807,412.20, 1,209,368.70 and 667,444.20 is: 999,720.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,412.20 : 1,209,368.70 = 667,444.20 : x
  2. Step 2: Convert to fraction form
    807,412.20/1,209,368.70 = 667,444.20/x
  3. Step 3: Cross multiply
    807,412.20x = 1,209,368.70 × 667,444.20
  4. Step 4: Simplify right side
    807,412.20x = 807,186,124,476.54
  5. Step 5: Solve for x
    x = 807,186,124,476.54/807,412.20
  6. Step 6: Final answer
    x = 999,720.00

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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.