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Finding the Fourth Proportional to 645,955.32, 890,494.51 and 454,374.12

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Solution

The fourth proportional to 645,955.32, 890,494.51 and 454,374.12 is: 626,386.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,955.32 : 890,494.51 = 454,374.12 : x
  2. Step 2: Convert to fraction form
    645,955.32/890,494.51 = 454,374.12/x
  3. Step 3: Cross multiply
    645,955.32x = 890,494.51 × 454,374.12
  4. Step 4: Simplify right side
    645,955.32x = 404,617,659,346.08
  5. Step 5: Solve for x
    x = 404,617,659,346.08/645,955.32
  6. Step 6: Final answer
    x = 626,386.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.