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Finding the Fourth Proportional to 660,838.40, 991,257.60 and 626,721.20

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Solution

The fourth proportional to 660,838.40, 991,257.60 and 626,721.20 is: 940,081.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,838.40 : 991,257.60 = 626,721.20 : x
  2. Step 2: Convert to fraction form
    660,838.40/991,257.60 = 626,721.20/x
  3. Step 3: Cross multiply
    660,838.40x = 991,257.60 × 626,721.20
  4. Step 4: Simplify right side
    660,838.40x = 621,242,152,581.12
  5. Step 5: Solve for x
    x = 621,242,152,581.12/660,838.40
  6. Step 6: Final answer
    x = 940,081.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.