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Finding the Fourth Proportional to 561,985.40, 842,978.10 and 552,654.20

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Solution

The fourth proportional to 561,985.40, 842,978.10 and 552,654.20 is: 828,981.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,985.40 : 842,978.10 = 552,654.20 : x
  2. Step 2: Convert to fraction form
    561,985.40/842,978.10 = 552,654.20/x
  3. Step 3: Cross multiply
    561,985.40x = 842,978.10 × 552,654.20
  4. Step 4: Simplify right side
    561,985.40x = 465,875,387,473.02
  5. Step 5: Solve for x
    x = 465,875,387,473.02/561,985.40
  6. Step 6: Final answer
    x = 828,981.30

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.