Home / 656,452.05-984,678.08-390,075.45

Finding the Fourth Proportional to 656,452.05, 984,678.08 and 390,075.45

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Solution

The fourth proportional to 656,452.05, 984,678.08 and 390,075.45 is: 585,113.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,452.05 : 984,678.08 = 390,075.45 : x
  2. Step 2: Convert to fraction form
    656,452.05/984,678.08 = 390,075.45/x
  3. Step 3: Cross multiply
    656,452.05x = 984,678.08 × 390,075.45
  4. Step 4: Simplify right side
    656,452.05x = 384,098,743,210.76
  5. Step 5: Solve for x
    x = 384,098,743,210.76/656,452.05
  6. Step 6: Final answer
    x = 585,113.18

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Double scale
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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.