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Finding the Fourth Proportional to 875,800.80, 1,314,284.40 and 402,242.40

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Solution

The fourth proportional to 875,800.80, 1,314,284.40 and 402,242.40 is: 603,631.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    875,800.80 : 1,314,284.40 = 402,242.40 : x
  2. Step 2: Convert to fraction form
    875,800.80/1,314,284.40 = 402,242.40/x
  3. Step 3: Cross multiply
    875,800.80x = 1,314,284.40 × 402,242.40
  4. Step 4: Simplify right side
    875,800.80x = 528,660,911,338.56
  5. Step 5: Solve for x
    x = 528,660,911,338.56/875,800.80
  6. Step 6: Final answer
    x = 603,631.46

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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.