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Finding the Fourth Proportional to 648,910.40, 972,904.80 and 249,396.80

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Solution

The fourth proportional to 648,910.40, 972,904.80 and 249,396.80 is: 373,918.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,910.40 : 972,904.80 = 249,396.80 : x
  2. Step 2: Convert to fraction form
    648,910.40/972,904.80 = 249,396.80/x
  3. Step 3: Cross multiply
    648,910.40x = 972,904.80 × 249,396.80
  4. Step 4: Simplify right side
    648,910.40x = 242,639,343,824.64
  5. Step 5: Solve for x
    x = 242,639,343,824.64/648,910.40
  6. Step 6: Final answer
    x = 373,918.10

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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.