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Finding the Fourth Proportional to 489,402.21, 734,070.51 and 134,386.50

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Solution

The fourth proportional to 489,402.21, 734,070.51 and 134,386.50 is: 201,570.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,402.21 : 734,070.51 = 134,386.50 : x
  2. Step 2: Convert to fraction form
    489,402.21/734,070.51 = 134,386.50/x
  3. Step 3: Cross multiply
    489,402.21x = 734,070.51 × 134,386.50
  4. Step 4: Simplify right side
    489,402.21x = 98,649,166,592.12
  5. Step 5: Solve for x
    x = 98,649,166,592.12/489,402.21
  6. Step 6: Final answer
    x = 201,570.74

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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.