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Finding the Fourth Proportional to 641,979, 885,920.12 and 355,492.92

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Solution

The fourth proportional to 641,979, 885,920.12 and 355,492.92 is: 490,574.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,979 : 885,920.12 = 355,492.92 : x
  2. Step 2: Convert to fraction form
    641,979/885,920.12 = 355,492.92/x
  3. Step 3: Cross multiply
    641,979x = 885,920.12 × 355,492.92
  4. Step 4: Simplify right side
    641,979x = 314,938,330,345.55
  5. Step 5: Solve for x
    x = 314,938,330,345.55/641,979
  6. Step 6: Final answer
    x = 490,574.19

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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.