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Finding the Fourth Proportional to 660,486.47, 990,417.42 and 255,868.19

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Solution

The fourth proportional to 660,486.47, 990,417.42 and 255,868.19 is: 383,681.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,486.47 : 990,417.42 = 255,868.19 : x
  2. Step 2: Convert to fraction form
    660,486.47/990,417.42 = 255,868.19/x
  3. Step 3: Cross multiply
    660,486.47x = 990,417.42 × 255,868.19
  4. Step 4: Simplify right side
    660,486.47x = 253,416,312,599.87
  5. Step 5: Solve for x
    x = 253,416,312,599.87/660,486.47
  6. Step 6: Final answer
    x = 383,681.31

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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.