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Finding the Fourth Proportional to 875,107.70, 1,312,661.55 and 800,312.30

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Solution

The fourth proportional to 875,107.70, 1,312,661.55 and 800,312.30 is: 1,200,468.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    875,107.70 : 1,312,661.55 = 800,312.30 : x
  2. Step 2: Convert to fraction form
    875,107.70/1,312,661.55 = 800,312.30/x
  3. Step 3: Cross multiply
    875,107.70x = 1,312,661.55 × 800,312.30
  4. Step 4: Simplify right side
    875,107.70x = 1,050,539,184,202.07
  5. Step 5: Solve for x
    x = 1,050,539,184,202.07/875,107.70
  6. Step 6: Final answer
    x = 1,200,468.45

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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.