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Finding the Fourth Proportional to 704,868.90, 972,720 and 382,578.99

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Solution

The fourth proportional to 704,868.90, 972,720 and 382,578.99 is: 527,959.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,868.90 : 972,720 = 382,578.99 : x
  2. Step 2: Convert to fraction form
    704,868.90/972,720 = 382,578.99/x
  3. Step 3: Cross multiply
    704,868.90x = 972,720 × 382,578.99
  4. Step 4: Simplify right side
    704,868.90x = 372,142,235,152.80
  5. Step 5: Solve for x
    x = 372,142,235,152.80/704,868.90
  6. Step 6: Final answer
    x = 527,959.50

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Half scale
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Double scale
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Similar ratio
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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.