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Finding the Fourth Proportional to 710,703.59, 980,768.59 and 388,413.63

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Solution

The fourth proportional to 710,703.59, 980,768.59 and 388,413.63 is: 536,009.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,703.59 : 980,768.59 = 388,413.63 : x
  2. Step 2: Convert to fraction form
    710,703.59/980,768.59 = 388,413.63/x
  3. Step 3: Cross multiply
    710,703.59x = 980,768.59 × 388,413.63
  4. Step 4: Simplify right side
    710,703.59x = 380,943,887,260.85
  5. Step 5: Solve for x
    x = 380,943,887,260.85/710,703.59
  6. Step 6: Final answer
    x = 536,009.52

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Double scale
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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.