Home / 645,646.32-890,623.08-387,453.96

Finding the Fourth Proportional to 645,646.32, 890,623.08 and 387,453.96

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Solution

The fourth proportional to 645,646.32, 890,623.08 and 387,453.96 is: 534,465.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,646.32 : 890,623.08 = 387,453.96 : x
  2. Step 2: Convert to fraction form
    645,646.32/890,623.08 = 387,453.96/x
  3. Step 3: Cross multiply
    645,646.32x = 890,623.08 × 387,453.96
  4. Step 4: Simplify right side
    645,646.32x = 345,075,439,213.40
  5. Step 5: Solve for x
    x = 345,075,439,213.40/645,646.32
  6. Step 6: Final answer
    x = 534,465.12

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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.