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Finding the Fourth Proportional to 696,692.76, 961,423.56 and 390,769.80

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Solution

The fourth proportional to 696,692.76, 961,423.56 and 390,769.80 is: 539,255.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    696,692.76 : 961,423.56 = 390,769.80 : x
  2. Step 2: Convert to fraction form
    696,692.76/961,423.56 = 390,769.80/x
  3. Step 3: Cross multiply
    696,692.76x = 961,423.56 × 390,769.80
  4. Step 4: Simplify right side
    696,692.76x = 375,695,292,256.49
  5. Step 5: Solve for x
    x = 375,695,292,256.49/696,692.76
  6. Step 6: Final answer
    x = 539,255.34

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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.