Home / 645,257.23-890,465.26-354,881.51

Finding the Fourth Proportional to 645,257.23, 890,465.26 and 354,881.51

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Solution

The fourth proportional to 645,257.23, 890,465.26 and 354,881.51 is: 489,742.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,257.23 : 890,465.26 = 354,881.51 : x
  2. Step 2: Convert to fraction form
    645,257.23/890,465.26 = 354,881.51/x
  3. Step 3: Cross multiply
    645,257.23x = 890,465.26 × 354,881.51
  4. Step 4: Simplify right side
    645,257.23x = 316,009,650,731.81
  5. Step 5: Solve for x
    x = 316,009,650,731.81/645,257.23
  6. Step 6: Final answer
    x = 489,742.13

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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.