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Finding the Fourth Proportional to 646,041.75, 891,521.88 and 355,650.95

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Solution

The fourth proportional to 646,041.75, 891,521.88 and 355,650.95 is: 490,789.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,041.75 : 891,521.88 = 355,650.95 : x
  2. Step 2: Convert to fraction form
    646,041.75/891,521.88 = 355,650.95/x
  3. Step 3: Cross multiply
    646,041.75x = 891,521.88 × 355,650.95
  4. Step 4: Simplify right side
    646,041.75x = 317,070,601,955.49
  5. Step 5: Solve for x
    x = 317,070,601,955.49/646,041.75
  6. Step 6: Final answer
    x = 490,789.65

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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.