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Finding the Fourth Proportional to 660,047.20, 910,709 and 373,567.28

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Solution

The fourth proportional to 660,047.20, 910,709 and 373,567.28 is: 515,434.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,047.20 : 910,709 = 373,567.28 : x
  2. Step 2: Convert to fraction form
    660,047.20/910,709 = 373,567.28/x
  3. Step 3: Cross multiply
    660,047.20x = 910,709 × 373,567.28
  4. Step 4: Simplify right side
    660,047.20x = 340,211,084,001.52
  5. Step 5: Solve for x
    x = 340,211,084,001.52/660,047.20
  6. Step 6: Final answer
    x = 515,434.48

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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.