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Finding the Fourth Proportional to 890,647.12, 1,335,685.56 and 291,445.84

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Solution

The fourth proportional to 890,647.12, 1,335,685.56 and 291,445.84 is: 437,075.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,647.12 : 1,335,685.56 = 291,445.84 : x
  2. Step 2: Convert to fraction form
    890,647.12/1,335,685.56 = 291,445.84/x
  3. Step 3: Cross multiply
    890,647.12x = 1,335,685.56 × 291,445.84
  4. Step 4: Simplify right side
    890,647.12x = 389,280,000,010.07
  5. Step 5: Solve for x
    x = 389,280,000,010.07/890,647.12
  6. Step 6: Final answer
    x = 437,075.46

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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.