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Finding the Fourth Proportional to 646,726.80, 970,090.20 and 609,985.20

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Solution

The fourth proportional to 646,726.80, 970,090.20 and 609,985.20 is: 914,977.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,726.80 : 970,090.20 = 609,985.20 : x
  2. Step 2: Convert to fraction form
    646,726.80/970,090.20 = 609,985.20/x
  3. Step 3: Cross multiply
    646,726.80x = 970,090.20 × 609,985.20
  4. Step 4: Simplify right side
    646,726.80x = 591,740,664,665.04
  5. Step 5: Solve for x
    x = 591,740,664,665.04/646,726.80
  6. Step 6: Final answer
    x = 914,977.80

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Half scale
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Double scale
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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.