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Finding the Fourth Proportional to 572,543.40, 858,555.90 and 217,439.40

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Solution

The fourth proportional to 572,543.40, 858,555.90 and 217,439.40 is: 326,060.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,543.40 : 858,555.90 = 217,439.40 : x
  2. Step 2: Convert to fraction form
    572,543.40/858,555.90 = 217,439.40/x
  3. Step 3: Cross multiply
    572,543.40x = 858,555.90 × 217,439.40
  4. Step 4: Simplify right side
    572,543.40x = 186,683,879,762.46
  5. Step 5: Solve for x
    x = 186,683,879,762.46/572,543.40
  6. Step 6: Final answer
    x = 326,060.66

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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.