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Finding the Fourth Proportional to 660,486.30, 990,417.15 and 255,868.02

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Solution

The fourth proportional to 660,486.30, 990,417.15 and 255,868.02 is: 383,681.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,486.30 : 990,417.15 = 255,868.02 : x
  2. Step 2: Convert to fraction form
    660,486.30/990,417.15 = 255,868.02/x
  3. Step 3: Cross multiply
    660,486.30x = 990,417.15 × 255,868.02
  4. Step 4: Simplify right side
    660,486.30x = 253,416,075,144.54
  5. Step 5: Solve for x
    x = 253,416,075,144.54/660,486.30
  6. Step 6: Final answer
    x = 383,681.05

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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.