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Finding the Fourth Proportional to 618,426.40, 926,564.40 and 285,319.20

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Solution

The fourth proportional to 618,426.40, 926,564.40 and 285,319.20 is: 427,482.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,426.40 : 926,564.40 = 285,319.20 : x
  2. Step 2: Convert to fraction form
    618,426.40/926,564.40 = 285,319.20/x
  3. Step 3: Cross multiply
    618,426.40x = 926,564.40 × 285,319.20
  4. Step 4: Simplify right side
    618,426.40x = 264,366,613,356.48
  5. Step 5: Solve for x
    x = 264,366,613,356.48/618,426.40
  6. Step 6: Final answer
    x = 427,482.74

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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.