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Finding the Fourth Proportional to 710,430.66, 980,408.43 and 388,160.73

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Solution

The fourth proportional to 710,430.66, 980,408.43 and 388,160.73 is: 535,669.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,430.66 : 980,408.43 = 388,160.73 : x
  2. Step 2: Convert to fraction form
    710,430.66/980,408.43 = 388,160.73/x
  3. Step 3: Cross multiply
    710,430.66x = 980,408.43 × 388,160.73
  4. Step 4: Simplify right side
    710,430.66x = 380,556,051,886.95
  5. Step 5: Solve for x
    x = 380,556,051,886.95/710,430.66
  6. Step 6: Final answer
    x = 535,669.52

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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.