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Finding the Fourth Proportional to 648,018.80, 972,028.20 and 611,277.20

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Solution

The fourth proportional to 648,018.80, 972,028.20 and 611,277.20 is: 916,915.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,018.80 : 972,028.20 = 611,277.20 : x
  2. Step 2: Convert to fraction form
    648,018.80/972,028.20 = 611,277.20/x
  3. Step 3: Cross multiply
    648,018.80x = 972,028.20 × 611,277.20
  4. Step 4: Simplify right side
    648,018.80x = 594,178,676,417.04
  5. Step 5: Solve for x
    x = 594,178,676,417.04/648,018.80
  6. Step 6: Final answer
    x = 916,915.80

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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.