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Finding the Fourth Proportional to 709,480.80, 979,047.54 and 387,188.28

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Solution

The fourth proportional to 709,480.80, 979,047.54 and 387,188.28 is: 534,300.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,480.80 : 979,047.54 = 387,188.28 : x
  2. Step 2: Convert to fraction form
    709,480.80/979,047.54 = 387,188.28/x
  3. Step 3: Cross multiply
    709,480.80x = 979,047.54 × 387,188.28
  4. Step 4: Simplify right side
    709,480.80x = 379,075,733,050.83
  5. Step 5: Solve for x
    x = 379,075,733,050.83/709,480.80
  6. Step 6: Final answer
    x = 534,300.20

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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.