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Finding the Fourth Proportional to 581,543.60, 870,915.72 and 393,986.48

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Solution

The fourth proportional to 581,543.60, 870,915.72 and 393,986.48 is: 590,031.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    581,543.60 : 870,915.72 = 393,986.48 : x
  2. Step 2: Convert to fraction form
    581,543.60/870,915.72 = 393,986.48/x
  3. Step 3: Cross multiply
    581,543.60x = 870,915.72 × 393,986.48
  4. Step 4: Simplify right side
    581,543.60x = 343,129,018,899.47
  5. Step 5: Solve for x
    x = 343,129,018,899.47/581,543.60
  6. Step 6: Final answer
    x = 590,031.46

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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.