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Finding the Fourth Proportional to 657,630.20, 921,615.40 and 657,630.20

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Solution

The fourth proportional to 657,630.20, 921,615.40 and 657,630.20 is: 921,615.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,630.20 : 921,615.40 = 657,630.20 : x
  2. Step 2: Convert to fraction form
    657,630.20/921,615.40 = 657,630.20/x
  3. Step 3: Cross multiply
    657,630.20x = 921,615.40 × 657,630.20
  4. Step 4: Simplify right side
    657,630.20x = 606,082,119,825.08
  5. Step 5: Solve for x
    x = 606,082,119,825.08/657,630.20
  6. Step 6: Final answer
    x = 921,615.40

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.