Home / 686,678.70-1,030,455.45-402,368.70

Finding the Fourth Proportional to 686,678.70, 1,030,455.45 and 402,368.70

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Solution

The fourth proportional to 686,678.70, 1,030,455.45 and 402,368.70 is: 603,809.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,678.70 : 1,030,455.45 = 402,368.70 : x
  2. Step 2: Convert to fraction form
    686,678.70/1,030,455.45 = 402,368.70/x
  3. Step 3: Cross multiply
    686,678.70x = 1,030,455.45 × 402,368.70
  4. Step 4: Simplify right side
    686,678.70x = 414,623,019,824.42
  5. Step 5: Solve for x
    x = 414,623,019,824.42/686,678.70
  6. Step 6: Final answer
    x = 603,809.35

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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.