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Finding the Fourth Proportional to 660,038.20, 989,862.90 and 260,546.20

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Solution

The fourth proportional to 660,038.20, 989,862.90 and 260,546.20 is: 390,742.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,038.20 : 989,862.90 = 260,546.20 : x
  2. Step 2: Convert to fraction form
    660,038.20/989,862.90 = 260,546.20/x
  3. Step 3: Cross multiply
    660,038.20x = 989,862.90 × 260,546.20
  4. Step 4: Simplify right side
    660,038.20x = 257,905,017,115.98
  5. Step 5: Solve for x
    x = 257,905,017,115.98/660,038.20
  6. Step 6: Final answer
    x = 390,742.56

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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.