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Finding the Fourth Proportional to 713,457.70, 1,070,186.55 and 648,139.30

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Solution

The fourth proportional to 713,457.70, 1,070,186.55 and 648,139.30 is: 972,208.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,457.70 : 1,070,186.55 = 648,139.30 : x
  2. Step 2: Convert to fraction form
    713,457.70/1,070,186.55 = 648,139.30/x
  3. Step 3: Cross multiply
    713,457.70x = 1,070,186.55 × 648,139.30
  4. Step 4: Simplify right side
    713,457.70x = 693,629,961,386.42
  5. Step 5: Solve for x
    x = 693,629,961,386.42/713,457.70
  6. Step 6: Final answer
    x = 972,208.95

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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.