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Finding the Fourth Proportional to 670,643.12, 925,409.88 and 384,146.12

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Solution

The fourth proportional to 670,643.12, 925,409.88 and 384,146.12 is: 530,077.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,643.12 : 925,409.88 = 384,146.12 : x
  2. Step 2: Convert to fraction form
    670,643.12/925,409.88 = 384,146.12/x
  3. Step 3: Cross multiply
    670,643.12x = 925,409.88 × 384,146.12
  4. Step 4: Simplify right side
    670,643.12x = 355,492,614,811.67
  5. Step 5: Solve for x
    x = 355,492,614,811.67/670,643.12
  6. Step 6: Final answer
    x = 530,077.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.