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Finding the Fourth Proportional to 806,622.60, 1,209,642.30 and 407,130.60

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Solution

The fourth proportional to 806,622.60, 1,209,642.30 and 407,130.60 is: 610,548.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    806,622.60 : 1,209,642.30 = 407,130.60 : x
  2. Step 2: Convert to fraction form
    806,622.60/1,209,642.30 = 407,130.60/x
  3. Step 3: Cross multiply
    806,622.60x = 1,209,642.30 × 407,130.60
  4. Step 4: Simplify right side
    806,622.60x = 492,482,395,384.38
  5. Step 5: Solve for x
    x = 492,482,395,384.38/806,622.60
  6. Step 6: Final answer
    x = 610,548.72

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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.