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Finding the Fourth Proportional to 768,503.76, 1,151,968.05 and 319,485.12

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Solution

The fourth proportional to 768,503.76, 1,151,968.05 and 319,485.12 is: 478,900.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,503.76 : 1,151,968.05 = 319,485.12 : x
  2. Step 2: Convert to fraction form
    768,503.76/1,151,968.05 = 319,485.12/x
  3. Step 3: Cross multiply
    768,503.76x = 1,151,968.05 × 319,485.12
  4. Step 4: Simplify right side
    768,503.76x = 368,036,650,690.42
  5. Step 5: Solve for x
    x = 368,036,650,690.42/768,503.76
  6. Step 6: Final answer
    x = 478,900.26

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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.