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Finding the Fourth Proportional to 710,564.40, 980,549.60 and 388,285.60

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Solution

The fourth proportional to 710,564.40, 980,549.60 and 388,285.60 is: 535,818.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,564.40 : 980,549.60 = 388,285.60 : x
  2. Step 2: Convert to fraction form
    710,564.40/980,549.60 = 388,285.60/x
  3. Step 3: Cross multiply
    710,564.40x = 980,549.60 × 388,285.60
  4. Step 4: Simplify right side
    710,564.40x = 380,733,289,765.76
  5. Step 5: Solve for x
    x = 380,733,289,765.76/710,564.40
  6. Step 6: Final answer
    x = 535,818.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.