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Finding the Fourth Proportional to 719,368.40, 992,752.44 and 392,700.80

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Solution

The fourth proportional to 719,368.40, 992,752.44 and 392,700.80 is: 541,940.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,368.40 : 992,752.44 = 392,700.80 : x
  2. Step 2: Convert to fraction form
    719,368.40/992,752.44 = 392,700.80/x
  3. Step 3: Cross multiply
    719,368.40x = 992,752.44 × 392,700.80
  4. Step 4: Simplify right side
    719,368.40x = 389,854,677,389.95
  5. Step 5: Solve for x
    x = 389,854,677,389.95/719,368.40
  6. Step 6: Final answer
    x = 541,940.23

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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.