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Finding the Fourth Proportional to 640,779.92, 884,262.60 and 354,312.08

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Solution

The fourth proportional to 640,779.92, 884,262.60 and 354,312.08 is: 488,943.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,779.92 : 884,262.60 = 354,312.08 : x
  2. Step 2: Convert to fraction form
    640,779.92/884,262.60 = 354,312.08/x
  3. Step 3: Cross multiply
    640,779.92x = 884,262.60 × 354,312.08
  4. Step 4: Simplify right side
    640,779.92x = 313,304,921,072.21
  5. Step 5: Solve for x
    x = 313,304,921,072.21/640,779.92
  6. Step 6: Final answer
    x = 488,943.10

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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.