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Finding the Fourth Proportional to 679,783.32, 938,080.74 and 373,859.28

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Solution

The fourth proportional to 679,783.32, 938,080.74 and 373,859.28 is: 515,914.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,783.32 : 938,080.74 = 373,859.28 : x
  2. Step 2: Convert to fraction form
    679,783.32/938,080.74 = 373,859.28/x
  3. Step 3: Cross multiply
    679,783.32x = 938,080.74 × 373,859.28
  4. Step 4: Simplify right side
    679,783.32x = 350,710,190,038.27
  5. Step 5: Solve for x
    x = 350,710,190,038.27/679,783.32
  6. Step 6: Final answer
    x = 515,914.67

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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.