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Finding the Fourth Proportional to 648,748.90, 973,123.35 and 612,007.30

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Solution

The fourth proportional to 648,748.90, 973,123.35 and 612,007.30 is: 918,010.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,748.90 : 973,123.35 = 612,007.30 : x
  2. Step 2: Convert to fraction form
    648,748.90/973,123.35 = 612,007.30/x
  3. Step 3: Cross multiply
    648,748.90x = 973,123.35 × 612,007.30
  4. Step 4: Simplify right side
    648,748.90x = 595,558,594,000.46
  5. Step 5: Solve for x
    x = 595,558,594,000.46/648,748.90
  6. Step 6: Final answer
    x = 918,010.95

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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.