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Finding the Fourth Proportional to 489,897.51, 734,849.90 and 134,931

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Solution

The fourth proportional to 489,897.51, 734,849.90 and 134,931 is: 202,397.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,897.51 : 734,849.90 = 134,931 : x
  2. Step 2: Convert to fraction form
    489,897.51/734,849.90 = 134,931/x
  3. Step 3: Cross multiply
    489,897.51x = 734,849.90 × 134,931
  4. Step 4: Simplify right side
    489,897.51x = 99,154,031,856.90
  5. Step 5: Solve for x
    x = 99,154,031,856.90/489,897.51
  6. Step 6: Final answer
    x = 202,397.50

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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.