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Finding the Fourth Proportional to 545,862.40, 818,793.60 and 386,430.10

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Solution

The fourth proportional to 545,862.40, 818,793.60 and 386,430.10 is: 579,645.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,862.40 : 818,793.60 = 386,430.10 : x
  2. Step 2: Convert to fraction form
    545,862.40/818,793.60 = 386,430.10/x
  3. Step 3: Cross multiply
    545,862.40x = 818,793.60 × 386,430.10
  4. Step 4: Simplify right side
    545,862.40x = 316,406,492,727.36
  5. Step 5: Solve for x
    x = 316,406,492,727.36/545,862.40
  6. Step 6: Final answer
    x = 579,645.15

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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.