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Finding the Fourth Proportional to 875,871.80, 1,314,390.90 and 402,313.40

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Solution

The fourth proportional to 875,871.80, 1,314,390.90 and 402,313.40 is: 603,737.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    875,871.80 : 1,314,390.90 = 402,313.40 : x
  2. Step 2: Convert to fraction form
    875,871.80/1,314,390.90 = 402,313.40/x
  3. Step 3: Cross multiply
    875,871.80x = 1,314,390.90 × 402,313.40
  4. Step 4: Simplify right side
    875,871.80x = 528,797,071,908.06
  5. Step 5: Solve for x
    x = 528,797,071,908.06/875,871.80
  6. Step 6: Final answer
    x = 603,737.98

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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.