Home / 645,111.64-890,284.44-358,636.50

Finding the Fourth Proportional to 645,111.64, 890,284.44 and 358,636.50

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Solution

The fourth proportional to 645,111.64, 890,284.44 and 358,636.50 is: 494,935.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,111.64 : 890,284.44 = 358,636.50 : x
  2. Step 2: Convert to fraction form
    645,111.64/890,284.44 = 358,636.50/x
  3. Step 3: Cross multiply
    645,111.64x = 890,284.44 × 358,636.50
  4. Step 4: Simplify right side
    645,111.64x = 319,288,495,566.06
  5. Step 5: Solve for x
    x = 319,288,495,566.06/645,111.64
  6. Step 6: Final answer
    x = 494,935.26

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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.