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Finding the Fourth Proportional to 386,715.60, 581,628.60 and 346,280.40

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Solution

The fourth proportional to 386,715.60, 581,628.60 and 346,280.40 is: 520,813.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,715.60 : 581,628.60 = 346,280.40 : x
  2. Step 2: Convert to fraction form
    386,715.60/581,628.60 = 346,280.40/x
  3. Step 3: Cross multiply
    386,715.60x = 581,628.60 × 346,280.40
  4. Step 4: Simplify right side
    386,715.60x = 201,406,584,259.44
  5. Step 5: Solve for x
    x = 201,406,584,259.44/386,715.60
  6. Step 6: Final answer
    x = 520,813.19

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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.