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Finding the Fourth Proportional to 645,794.98, 891,116.85 and 359,294.74

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Solution

The fourth proportional to 645,794.98, 891,116.85 and 359,294.74 is: 495,782.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,794.98 : 891,116.85 = 359,294.74 : x
  2. Step 2: Convert to fraction form
    645,794.98/891,116.85 = 359,294.74/x
  3. Step 3: Cross multiply
    645,794.98x = 891,116.85 × 359,294.74
  4. Step 4: Simplify right side
    645,794.98x = 320,173,596,930.37
  5. Step 5: Solve for x
    x = 320,173,596,930.37/645,794.98
  6. Step 6: Final answer
    x = 495,782.11

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Double scale
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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.