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Finding the Fourth Proportional to 665,118.40, 917,867.10 and 363,312.40

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Solution

The fourth proportional to 665,118.40, 917,867.10 and 363,312.40 is: 501,373.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,118.40 : 917,867.10 = 363,312.40 : x
  2. Step 2: Convert to fraction form
    665,118.40/917,867.10 = 363,312.40/x
  3. Step 3: Cross multiply
    665,118.40x = 917,867.10 × 363,312.40
  4. Step 4: Simplify right side
    665,118.40x = 333,472,497,165.48
  5. Step 5: Solve for x
    x = 333,472,497,165.48/665,118.40
  6. Step 6: Final answer
    x = 501,373.13

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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.