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Finding the Fourth Proportional to 871,881.80, 1,308,038.70 and 398,467.40

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Solution

The fourth proportional to 871,881.80, 1,308,038.70 and 398,467.40 is: 597,799.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,881.80 : 1,308,038.70 = 398,467.40 : x
  2. Step 2: Convert to fraction form
    871,881.80/1,308,038.70 = 398,467.40/x
  3. Step 3: Cross multiply
    871,881.80x = 1,308,038.70 × 398,467.40
  4. Step 4: Simplify right side
    871,881.80x = 521,210,779,888.38
  5. Step 5: Solve for x
    x = 521,210,779,888.38/871,881.80
  6. Step 6: Final answer
    x = 597,799.82

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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.