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Finding the Fourth Proportional to 545,407.40, 818,111.10 and 171,430.40

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Solution

The fourth proportional to 545,407.40, 818,111.10 and 171,430.40 is: 257,145.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,407.40 : 818,111.10 = 171,430.40 : x
  2. Step 2: Convert to fraction form
    545,407.40/818,111.10 = 171,430.40/x
  3. Step 3: Cross multiply
    545,407.40x = 818,111.10 × 171,430.40
  4. Step 4: Simplify right side
    545,407.40x = 140,249,113,117.44
  5. Step 5: Solve for x
    x = 140,249,113,117.44/545,407.40
  6. Step 6: Final answer
    x = 257,145.60

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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.