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Finding the Fourth Proportional to 643,484.54, 888,008.72 and 357,006.67

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Solution

The fourth proportional to 643,484.54, 888,008.72 and 357,006.67 is: 492,669.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,484.54 : 888,008.72 = 357,006.67 : x
  2. Step 2: Convert to fraction form
    643,484.54/888,008.72 = 357,006.67/x
  3. Step 3: Cross multiply
    643,484.54x = 888,008.72 × 357,006.67
  4. Step 4: Simplify right side
    643,484.54x = 317,025,036,058.16
  5. Step 5: Solve for x
    x = 317,025,036,058.16/643,484.54
  6. Step 6: Final answer
    x = 492,669.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.