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Finding the Fourth Proportional to 529,637.40, 792,641.70 and 319,426.20

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Solution

The fourth proportional to 529,637.40, 792,641.70 and 319,426.20 is: 478,045.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,637.40 : 792,641.70 = 319,426.20 : x
  2. Step 2: Convert to fraction form
    529,637.40/792,641.70 = 319,426.20/x
  3. Step 3: Cross multiply
    529,637.40x = 792,641.70 × 319,426.20
  4. Step 4: Simplify right side
    529,637.40x = 253,190,526,192.54
  5. Step 5: Solve for x
    x = 253,190,526,192.54/529,637.40
  6. Step 6: Final answer
    x = 478,045.03

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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.