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Finding the Fourth Proportional to 5,287,991.64, 7,931,987.54 and 3,490,454.63

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Solution

The fourth proportional to 5,287,991.64, 7,931,987.54 and 3,490,454.63 is: 5,235,681.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,287,991.64 : 7,931,987.54 = 3,490,454.63 : x
  2. Step 2: Convert to fraction form
    5,287,991.64/7,931,987.54 = 3,490,454.63/x
  3. Step 3: Cross multiply
    5,287,991.64x = 7,931,987.54 × 3,490,454.63
  4. Step 4: Simplify right side
    5,287,991.64x = 27,686,242,576,983.10
  5. Step 5: Solve for x
    x = 27,686,242,576,983.10/5,287,991.64
  6. Step 6: Final answer
    x = 5,235,681.99

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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.