Home / 919,320.40-1,378,980.60-288,233.20

Finding the Fourth Proportional to 919,320.40, 1,378,980.60 and 288,233.20

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Solution

The fourth proportional to 919,320.40, 1,378,980.60 and 288,233.20 is: 432,349.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,320.40 : 1,378,980.60 = 288,233.20 : x
  2. Step 2: Convert to fraction form
    919,320.40/1,378,980.60 = 288,233.20/x
  3. Step 3: Cross multiply
    919,320.40x = 1,378,980.60 × 288,233.20
  4. Step 4: Simplify right side
    919,320.40x = 397,467,991,075.92
  5. Step 5: Solve for x
    x = 397,467,991,075.92/919,320.40
  6. Step 6: Final answer
    x = 432,349.80

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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.