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Finding the Fourth Proportional to 391,075.02, 539,738.16 and 282,530.49

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Solution

The fourth proportional to 391,075.02, 539,738.16 and 282,530.49 is: 389,931.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,075.02 : 539,738.16 = 282,530.49 : x
  2. Step 2: Convert to fraction form
    391,075.02/539,738.16 = 282,530.49/x
  3. Step 3: Cross multiply
    391,075.02x = 539,738.16 × 282,530.49
  4. Step 4: Simplify right side
    391,075.02x = 152,492,486,816.50
  5. Step 5: Solve for x
    x = 152,492,486,816.50/391,075.02
  6. Step 6: Final answer
    x = 389,931.55

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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.