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Finding the Fourth Proportional to 641,779.32, 885,662.52 and 355,304.16

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Solution

The fourth proportional to 641,779.32, 885,662.52 and 355,304.16 is: 490,323.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,779.32 : 885,662.52 = 355,304.16 : x
  2. Step 2: Convert to fraction form
    641,779.32/885,662.52 = 355,304.16/x
  3. Step 3: Cross multiply
    641,779.32x = 885,662.52 × 355,304.16
  4. Step 4: Simplify right side
    641,779.32x = 314,679,577,712.08
  5. Step 5: Solve for x
    x = 314,679,577,712.08/641,779.32
  6. Step 6: Final answer
    x = 490,323.65

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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.