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Finding the Fourth Proportional to 710,459.55, 980,448.30 and 388,189.67

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Solution

The fourth proportional to 710,459.55, 980,448.30 and 388,189.67 is: 535,709.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,459.55 : 980,448.30 = 388,189.67 : x
  2. Step 2: Convert to fraction form
    710,459.55/980,448.30 = 388,189.67/x
  3. Step 3: Cross multiply
    710,459.55x = 980,448.30 × 388,189.67
  4. Step 4: Simplify right side
    710,459.55x = 380,599,897,126.82
  5. Step 5: Solve for x
    x = 380,599,897,126.82/710,459.55
  6. Step 6: Final answer
    x = 535,709.45

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1.5x scale

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.