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Finding the Fourth Proportional to 459,383.40, 689,075.10 and 370,809.90

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Solution

The fourth proportional to 459,383.40, 689,075.10 and 370,809.90 is: 556,214.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,383.40 : 689,075.10 = 370,809.90 : x
  2. Step 2: Convert to fraction form
    459,383.40/689,075.10 = 370,809.90/x
  3. Step 3: Cross multiply
    459,383.40x = 689,075.10 × 370,809.90
  4. Step 4: Simplify right side
    459,383.40x = 255,515,868,923.49
  5. Step 5: Solve for x
    x = 255,515,868,923.49/459,383.40
  6. Step 6: Final answer
    x = 556,214.85

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Similar ratio
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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.