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Finding the Fourth Proportional to 869,618.80, 1,304,428.20 and 308,580.40

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Solution

The fourth proportional to 869,618.80, 1,304,428.20 and 308,580.40 is: 462,870.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,618.80 : 1,304,428.20 = 308,580.40 : x
  2. Step 2: Convert to fraction form
    869,618.80/1,304,428.20 = 308,580.40/x
  3. Step 3: Cross multiply
    869,618.80x = 1,304,428.20 × 308,580.40
  4. Step 4: Simplify right side
    869,618.80x = 402,520,975,727.28
  5. Step 5: Solve for x
    x = 402,520,975,727.28/869,618.80
  6. Step 6: Final answer
    x = 462,870.60

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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.